exam 3 (2.0)

Slow axonal transport is:

Active (requires ATP) and can occur in either the anterograde or retrograde direction 

Active (requires ATP) and only occurs in the anterograde direction 

Active (requires ATP) and only occurs in the retrograde direction 

Passive and only occurs in the anterograde direction 

Passive and only occurs in the retrograde direction

Active (requires ATP) and only occurs in the anterograde direction

Fast axonal transport is: 

Active (requires ATP) and can occur in either the anterograde or retrograde direction 

Active (requires ATP) and only occurs in the anterograde direction

Active (requires ATP) and only occurs in the retrograde direction 

Passive and only occurs in the anterograde direction 

Passive and only occurs in the retrograde direction 

Active (requires ATP) and can occur in either the anterograde or retrograde direction

The primary functions of myelin is best defined as: 

Blocking the transmission of a nerve impulse 

Keeping axons from touching each other 

Producing faster nerve impulse propagation 

Producing slow but continuous impulse conduction 

Providing points of attachment for nerve threads

Producing faster nerve impulse propagation

Which of the following best reflects a characteristic of a neuron?

Excitable

Extreme short-lived cell

Low metabolic rate

Needs only oxygen for functionality

Rapid mitotic rate

Excitable

Which of the following best reflects a characteristic of a neuron?

Extreme longevity

Low metabolic rate

Needs only oxygen for functionality

Non-excitable

Rapid mitotic rate

Extreme longevity

Which of the following best reflects a characteristic of a neuron?

Extreme short-lived cell

High metabolic rate

Needs only oxygen for functionality

Non-excitable

Rapid mitotic rate

High metabolic rate

Which of the following best reflects a characteristic of a neuron?

Extreme short-lived cell

Low metabolic rate

Needs only oxygen for functionality

No mitotic rate

Non-excitable

No mitotic rate

Which of the following best reflects a characteristic of a neuron?

Extreme short-lived cell

Low metabolic rate

Non-excitableq

Rapid mitotic rate

Require continuous supplies of glucose and oxygen

Require continuous supplies of glucose and oxygen

Regarding the neuron, which region is where graded potentials are produced in response to triggering events.

Axon

Axon hillock

Axon terminal

Cell body

Dendrites

Dendrites

Regarding the neuron, which region is where action potentials are initiated in response to the GPSP.

Axon

Axon hillock

Axon terminal

Cell body

Dendrites

Axon hillock

Regarding the neuron, which region is responsible for conducting action potentials.

Axon

Axon hillock

Axon terminal

Cell body

Dendrites

Axon

The part of a neuron that conducts impulses away from its cell body is called a(n) ________.

Axon

Dendrite

Neurolemma

Nissl body

Perikaryon

Axon

Which part of the neuron contains the nucleus?

Axon

Axon hillock

Axon terminal

Dendrite

Soma

Soma

As an axon approaches the cell onto which it will terminate, it generally branches repeatedly into several:

Axon hillocks

Axon terminals

Dendrites

Perikaryons

Somas

Axon terminals

Where are synaptic knobs of a neuron located?

Along the length of axon collaterals

At the axon hillock

At the ends of dendrites

At the tips of axon terminal

Within the soma

At the tips of axon terminal

The segment of a neuron that conducts action potentials is its _______, a region that contains many _______ gated channels.

Axon, ligand-

Correct Answer

Axon, voltage-

Dendrite, ligand-

Dendrite, voltage-

Soma, ligand-

Axon, voltage-

The cytoplasm within a cell body of a neuron is called the:

Chromatophilic substance

Neurokaryon

Nissle body

Perikaryo

Perikaryon

Ependymal cells

Are a type of neuron

Are responsible for maintaining the spatial relationships between neurons in the CNS

Are responsible for producing cerebrospinal fluid in the CNS

Provide myelin sheaths for neurons in the CNS

Serve as an immune defense cell of the CNS

Are responsible for producing cerebrospinal fluid in the CNS

The cell type of the CNS that serves as an immune defense cell of the CNS is the:

Astrocytes

Ependymal cells

Microglial cells

Neurolemmocytes

Oligodendrocytes

Microglial cells

Microglial cells 

Are a type of neuron

Are responsible for maintaining the spatial relationships between neurons in the CNS

Are responsible for producing cerebrospinal fluid in the CNS

Provide myelin sheaths for neurons in the CNS

Serve as an immune defense cell of the CNS

Serve as an immune defense cell of the CNS

Glial cells differ from neurons in that they:

Are found only in the CNS and are mitotic

Are found only in the PNS and do not transmit action potentials

Capable of meiosis and do not transmit action potentials

Capable of mitosis and do not transmit action potentials

Do not divide and transmit action potentials much more slowly

 Capable of mitosis and do not transmit action potentials

What is the most abundant glial cell in the CNS?

Astrocyte

Ependymal cell

Neurolemmocyte (Schwann cell)

Microglial cell

Oligodendrocyte

Astrocyte

The glial cell that helps to circulate cerebrospinal fluid is the:

Astrocyte

Ependymal cell

Neurolemmocyte (Schwann cell)

Microglial cell

Oligodendrocyte

Ependymal cell

The glial cell that myelinates and insulates axons within the CNS is the:

Astrocyte

Ependymal cell

Neurolemmocyte (Schwann cell)

Microglial cell

Oligodendrocyte

Oligodendrocyte

The glial cell that helps to form the blood-brain barrier is the:

Astrocyte

Ependymal cell

Neurolemmocyte (Schwann cell)

Microglial cell

Oligodendrocyte

 Astrocyte

The glial cell that myelinates and insulates axons in the peripheral nervous system is the:

Astrocyte

Ependymal cell

Neurolemmocyte (Schwann cell)

Microglial cell

Oligodendrocyte

Neurolemmocyte (Schwann cell)

The glial cell that defends the body against pathogens is the:

Astrocyte

Ependymal cell

Neurolemmocyte (Schwann cell)

Microglial cell

Oligodendrocyte

Microglial cell

The glial cell that physically separates neuron cell bodies located within PNS is the:

Astrocyte

Neurolemmocyte (Schwann cell)

Microglial cell

Oligodendrocyte

Satellite cell

Satellite cell

The glial cell with the responsibility of occupying the space left by dead or dying neurons is the:

Astrocyte

Ependymal cell

Neurolemmocyte (Schwann cell)

Microglial cell

Oligodendrocyte

Astrocyte

The glial cell that provides structural support and organization to the CNS is the:

Astrocyte

Ependymal cell

Neurolemmocyte (Schwann cell)

Microglial cell

Oligodendrocyte

 Astrocyte

The glial cell with perivascular feet that wrap around capillaries in the CNS is the:

Astrocyte

Ependymal cell

Neurolemmocyte (Schwann cell)

Microglial cell

Oligodendrocyte

 Astrocyte

Which statement is most true regarding the action of an oligodendrocyte?

An oligodendrocyte attacks pathogens

An oligodendrocyte is responsible for forming part of the blood-brain barrier

Each oligodendrocyte can form a myelin sheath around many axons simultaneously

Each oligodendrocyte can wrap only a 1 mm portion of a single axon

Oligodendrocytes function only within the PNS

Each oligodendrocyte can form a myelin sheath around many axons simultaneously

What do all glial cells have in common?

They help to transmit the nerve signals

They transfer blood to the various neurons

They assist neurons in their respective functions

They all attack pathogens

They absorb extra blood and cerebrospinal fluid

They assist neurons in their respective functions

Schwann cells (neurolemmocytes) are functionally similar to ________.

Astrocyte

Ependymal cell

Microglial cell

Oligodendrocyte

Satellite cells

Oligodendrocyte

The cell type of the CNS that provides the myelin sheaths for neurons is the:

Astrocyte

Ependymal cell

Microglial cell

Oligodendrocyte

Satellite cells

Oligodendrocyte

Oligodendrocytes

Are a type of neuron

Are responsible for maintaining the spatial relationships between neurons in the CNS

Are responsible for producing cerebrospinal fluid in the CNS

Provide myelin sheaths for neurons in the CNS

Serve as an immune defense cell of the CNS

Provide myelin sheaths for neurons in the CNS

Which of the following best describes the function of astrocytes?

Control the chemical environment around neurons

Guide the migration of young neurons and aid in synapse formation

Physically support neurons in the CNS to create proper spatial relationships

Provide nutrients for the neurons

Serve as scar tissue after neural tissue damage

Control the chemical environment around neurons

Which of the following best describes the function of astrocytes?

Control how neurons communicate at the synapse

Guide the migration of young neurons and aid in synapse formation

Physically support neurons in the PNS to form nerves

Provide the immune defense for the CNS

Serve as neurons after neural tissue damage for a short time during repair

Guide the migration of young neurons and aid in synapse formation

Which of the following best describes the function of astrocytes?

Control how neurons communicate at the synapse

Guide the development and differentiation of neurons and glial cells

Physically support neurons in the CNS to create proper spatial relationships

Provide the immune defense for the CNS

Serve as neurons after neural tissue damage for a short time during repair

Physically support neurons in the CNS to create proper spatial relationships

Which of the following best describes the function of astrocytes?

Control how neurons communicate at the synapse

Guide the development and differentiation of neurons and glial cells

Physically support neurons in the PNS to form nerves

Provide nutrients for the neurons

Serve as neurons after neural tissue damage for a short time during repair

 Provide nutrients for the neurons

Which of the following best describes the function of astrocytes?

Control how neurons communicate at the synapse

Guide the development and differentiation of neurons and glial cells

Physically support neurons in the PNS to form nerves

Provide the immune defense for the CNS

Serve as scar tissue after neural tissue damage

Serve as scar tissue after neural tissue damage

Which cells are found lining the ventricles of the brain?

Astrocytes

Ependymal cells

Microglial cells

Neurolemmocytes

Oligodendrocytes

Ependymal cells

What are the ciliated neuroglia of the CNS that play an active role in moving the cerebrospinal fluid called?

Astrocytes

Ependymal cells

Microglial cells

Neurolemmocytes

Oligodendrocytes

Ependymal cells

Ependymal cells ________.

Are a type of macrophage

Are a type of neuron

Are the most numerous of the neuroglia

Help to circulate the cerebrospinal fluid

Provide nutrients directly to the neurons

Help to circulate the cerebrospinal fluid

Neuroglia that regulate the chemical environment around neurons by buffering potassium and recapturing neurotransmitters are ________.

Astrocytes

Ependymal cells

Microglial cells

Neurolemmocytes

Oligodendrocytes

Astrocytes

The cell type of the CNS responsible for maintaining the spatial relationship between the neurons is the:

Astrocytes

Ependymal cells

Microglial cells

Neurolemmocytes

Oligodendrocytes

Astrocytes

Astrocytes:

Are a type of neuron

Are responsible for maintaining the spatial relationships between neurons in the CNS

Are responsible for producing cerebrospinal fluid in the CNS

Provide myelin sheaths for neurons in the CNS

Serve as an immune defense cell of the CNS

Are responsible for maintaining the spatial relationships between neurons in the CNS

The cell type of the CNS responsible for producing cerebrospinal fluid is the:

Astrocytes

Ependymal cells

Microglial cells

Neurolemmocytes

Oligodendrocytes

 Ependymal cells

Depolarization of a neuron will most likely result from:

 Either the entry of a cation into or the exit of an anion out of a neuron

 Either the entry of an anion into or the exit of a cation out of a neuron. 

The entry of an anion into the neuron 

The entry of any ion into the neuron 

The exit of any ion out of the neuron

Either the entry of a cation into or the exit of an anion out of a neuron

Hyperpolarization of a neuron will most likely result from: 

Either the entry of a cation into or the exit of an anion out of a neuron

Either the entry of an anion into or the exit of a cation out of a neuron. 

The entry of a cation into the neuron

 The entry of any ion into the neuron 

The exit of any ion out of the neuron

 Either the entry of an anion into or the exit of a cation out of a neuron.

Which term best describes the membrane of an excitable cell when the membrane has returned to resting potential after a change in the membrane potential? 

Depolarized 

Hyperpolarized 

Nonpolarized 

Polarized

Repolarized

Repolarized

Which term best describes the membrane of an excitable cell when the membrane is more negative than its resting potential? 

Depolarized 

Hyperpolarized 

Nonpolarized 

Polarized 

Repolarized 

Hyperpolarized 

Which term best describes the membrane of an excitable cell when the membrane is more positive than its resting potential? 

Depolarized 

Hyperpolarized 

Nonpolarized

Polarized 

Repolarized

Depolarized 

Which term best describes the membrane of a cell when no resting potential is present?

Depolarized 

Hyperpolarized

 Nonpolarized 

Polarized

 Repolarized

nonpolarized

Which term best describes the membrane of an excitable cell when a resting potential is present? 

Depolarized 

Hyperpolarized 

Nonpolarized 

Polarized 

Repolarized

Polarized

In what way does the interior of a resting (non-conducting) neuron differ from the external environment? The interior is ________ 

Negatively charged and contains less potassium 

Negatively charged and contains more potassium 

Not charged and contains an equal amount of potassium 

Positively charged and contains less potassium 

Positively charged and contains more potassium

Negatively charged and contains more potassium

In what way does the interior of a resting (non-conducting) neuron differ from the external environment? The interior is ________ 

Negatively charged and contains less sodium 

Negatively charged and contains more sodium 

Not charged and contains an equal amount of sodium 

Positively charged and contains less sodium 

Positively charged and contains more sodium 

Negatively charged and contains less sodium 

Sodium has a higher concentration: 

Inside the cell versus outside the cell, and potassium is also more concentrated inside versus outside the cell

 Inside the cell versus outside the cell, whereas potassium has a higher concentration outside versus inside the cell 

Outside the cell versus inside the cell, and potassium is also more concentrated outside versus inside the cell 

Outside the cell versus inside the cell, whereas potassium has a higher concentration inside versus outside the cell

Outside the cell versus inside the cell, whereas potassium has a higher concentration inside versus outside the cell 

Potassium has a higher concentration: 

Inside the cell versus outside the cell, and sodium is also more concentrated inside versus outside the cell 

Inside the cell versus outside the cell, whereas sodium has a higher concentration outside versus inside the cell 

Outside the cell versus inside the cell, and sodium is also more concentrated outside versus inside the cell 

Outside the cell versus inside the cell, whereas sodium has a higher concentration inside versus outside the cell

 Inside the cell versus outside the cell, whereas sodium has a higher concentration outside versus inside the cell 

Q4:
Which of the following accurately represents ionic flux in/out of a neuron? 

[Cl-]out> [Cl-]in results in hyperpolarization 

[K+]in> [K+]out results in depolarization 

[K+]out> [K+]in results in hyperpolarization 

[Na+]in> [Na+]out results in depolarization 

[Na+]out> [Na+]in results in hyperpolarization

[K+]out> [K+]in results in hyperpolarization

Which of the following accurately represents ionic flux in/out of a neuron? 

[Cl-]in> [Cl-]out results in depolarization 

[K+]in> [K+]out results in depolarization

 [K+]in> [K+]out results in hyperpolarization 

[Na+]in> [Na+]out results in depolarization 

[Na+]in> [Na+]out results in hyperpolarization

[Na⁺]in > [Na⁺]out results in depolarization

Which of the following accurately represents ionic flux in/out of a neuron? 

[Cl-]out> [Cl-]in results in depolarization 

[K+]out> [K+]in results in depolarization

 [K+]out> [K+]in results in hyperpolarization

 [Na+]out> [Na+]in results in depolarization 

[Na+]out> [Na+]in results in hyperpolarization 

 [K+]out> [K+]in results in hyperpolarization

The electrochemical gradient refers to: 

The combination of electrical and chemical gradients between two areas 

The difference in concentration of a substance between two areas

 The difference in electrical charge between two areas 

The effect of an ion on the membrane potential 

The resistance a membrane has to allowing any charged chemical to pass through it 

 The combination of electrical and chemical gradients between two areas

Which of the following best completes the statement? A graded potential is a membrane potential change that:

Is all or none (always the same intensity)

Lasts for several seconds after ion channels have opened, closed, and reset

Travels the length of the nerve fiber (is long distance)

Varies in size depending on the magnitude of the stimulus (larger voltage change for stronger stimulus)

Varies in size depending on the magnitude of the stimulus

Select the statement about graded potentials that is most correct.

Graded potentials are self-propagating

Graded potentials have an all-or-none characteristic

Graded potentials may contribute to the development of an action potential

Graded potentials may travel long distances

Graded potentials travel in one direction along the membrane

 Graded potentials may contribute to the development of an action potential

Which of the following statements concerning graded potentials is true?

Graded potentials always have positive magnitudes

Graded potentials are local changes in membrane potential that occur in varying degrees of magnitude

Graded potentials in a neuron are mostly produced at axon hillock and axon terminal

Graded potentials occur only in response to excitatory stimuli

Graded potentials serve as long-distance signals within a cell

 Graded potentials are local changes in membrane potential that occur in varying degrees of magnitude

Which of the following statements concerning graded potentials is true?

Graded potentials always have positive magnitudes

Graded potentials are local changes in membrane potential that occur with only one type of magnitude

Graded potentials in a neuron are mostly produced at the dendrites and soma

Graded potentials occur only in response to excitatory stimuli

Graded potentials serve as long-distance signals within a cell

Graded potentials in a neuron are mostly produced at the dendrites and soma

Which of the following statements concerning graded potentials is true?

Graded potentials are local changes in membrane potential that occur with only one type of

magnitude

Graded potentials in a neuron are mostly produced at axon hillock and axon terminal

Graded potentials may have positive or negative magnitudes

Graded potentials occur only in response to excitatory stimuli

Graded potentials serve as long-distance signals within a cell

 Graded potentials may have positive or negative magnitudes

Which of the following statements concerning graded potentials is true?

Graded potentials always have positive magnitudes

Graded potentials are local changes in membrane potential that occur with only one type of

magnitude

Graded potentials in a neuron are mostly produced at axon hillock and axon terminal

Graded potentials occur in response to excitatory or inhibitory stimuli

Graded potentials serve as long-distance signals within a cell

Graded potentials occur in response to excitatory or inhibitory stimuli

Which of the following statements concerning graded potentials is true?

Graded potentials always have positive magnitudes

Graded potentials are local changes in membrane potential that occur with only one type of

magnitude

Graded potentials in a neuron are mostly produced at axon hillock and axon terminal

Graded potentials occur only in response to excitatory stimuli

Graded potentials serve as short-distance signals within a cell

Graded potentials serve as short-distance signals within a cell

Which of the following statements concerning membrane potentials is most accurate?

All cells have a resting membrane potential

The greater the membrane s permeability to an ion, the smaller the influence that ion has on

the resting membrane potential

The more charges that are separated by the plasma membrane the smaller the magnitude of the membrane potential

The plasma membrane of excitable cells is charged

Very little of the fluid both inside and outside the cell is electrically neutral

All cells have a resting membrane potential

Which of the following statements concerning membrane potentials is most accurate?

Only excitable cells have a resting membrane potential

The greater the membrane s permeability to an ion, the greater the influence that ion has on

the resting membrane potential

The more charges that are separated by the plasma membrane the smaller the magnitude of the membrane potential

The plasma membrane of excitable cells is charged

Very little of the fluid both inside and outside the cell is electrically neutral

 The greater the membrane’s permeability to an ion, the greater the influence that ion has on the resting membrane potential

Which of the following statements concerning membrane potentials is most accurate?

Only excitable cells have a resting membrane potential

The greater the membrane s permeability to an ion, the smaller the influence that ion has on

the resting membrane potential

The more charges that are separated by the plasma membrane the larger the magnitude of the membrane potential

The plasma membrane of excitable cells is charged

Very little of the fluid both inside and outside the cell is electrically neutral

The more charges that are separated by the plasma membrane the larger the magnitude of the membrane potential

Which of the following statements concerning membrane potentials is most accurate?

Only excitable cells have a resting membrane potential

The greater the membrane s permeability to an ion, the smaller the influence that ion has on

the resting membrane potential

The more charges that are separated by the plasma membrane the smaller the magnitude of the membrane potential

The plasma membrane of excitable cells is not actually charged

Very little of the fluid both inside and outside the cell is electrically neutral

The plasma membrane of excitable cells is not actually charged

Which of the following statements concerning membrane potentials is most accurate?

Only excitable cells have a resting membrane potential

The greater the membrane s permeability to an ion, the smaller the influence that ion has on

the resting membrane potential

The more charges that are separated by the plasma membrane the smaller the magnitude of the membrane potential

The plasma membrane of excitable cells is charged

The vast majority of fluid both inside and outside the cell is electrically neutral

The vast majority of fluid both inside and outside the cell is electrically neutral

The cells of excitable and non-excitable tissues share which of the following properties?

A resting membrane potential

A threshold potential

An ability to open Na+ gated channels in response to membrane potential changes

The ability to produce action potentials

The presence of voltage-gated channels in their membrane

A resting membrane potential

The separation of oppositely charged ionic particles across a resting neuron's membrane results in a potential that is measured as a:

Conductance

Current

Power

Resistance

Voltage

 Voltage

The most crucial factor determining the resting potential of a neuron is the diffusion of:

Sodium into the cell through gated channels

Sodium out of the cell through leak channels

Potassium into the cell through gated channels

Potassium out of the cell through leak channels

Potassium out of the cell through leak channels

If there were no sodium leak channels, the resting membrane potential of a neuron would be:

More negative

More positive

Nonpolar

The same

Nonpolar

Which term most correctly completes this statement? Ligand-gated ion channels are mainly

found in the ________ segment of a neuron.

Axon

Axon hillock

Axon terminal

Dendrite

Perikaryon

Dendrite

Which term most correctly completes this statement? Ligand-gated ion channels are mainly

found in the ________ segment of a neuron.

Axon

Axon hillock

Axon terminal

Perikaryon

Soma

Soma

An example of spatial summation would be: 

Action potentials occurring in two presynaptic inputs simultaneously converge upon the postsynaptic cell, initiating two different action potentials in the postsynaptic cell

 An EPSP and an IPSP occur simultaneously in time and cancel each other out  

Two EPSPs from the same presynaptic input occur so closely together in time that they add together or sum 

Two EPSPs that occur simultaneously from different presynaptic inputs add together or sum 

Two EPSPs that occur simultaneously from different presynaptic inputs add together or sum

Spatial summation takes place when: 

Action potentials occurring in two presynaptic inputs simultaneously converge upon the postsynaptic cell, initiating two different action potentials in the postsynaptic cell 

An EPSP and an IPSP occur simultaneously in time and cancel each other out

 Two EPSPs from the same presynaptic input occur so closely together in time that they add together or sum 

Two EPSPs that occur simultaneously from different presynaptic inputs add together or sum

 Two EPSPs that occur simultaneously from different presynaptic inputs add together or sum

Example of temporal summation would be: 

Action potentials occurring in two presynaptic inputs simultaneously converge upon the postsynaptic cell, initiating two different action potentials in the postsynaptic cell 

An EPSP and an IPSP occur simultaneously in time and cancel each other out 

Two EPSPs from the same presynaptic input occur so closely together in time that they add together or sum 

Two EPSPs that occur simultaneously from different presynaptic inputs add together or sum 

 Two EPSPs from the same presynaptic input occur so closely together in time that they add together or sum

Temporal summation takes place when: 

Action potentials occurring in two presynaptic inputs simultaneously converge upon the postsynaptic cell, initiating two different action potentials in the postsynaptic cell 

An EPSP and an IPSP occur simultaneously in time and cancel each other out 

Two EPSPs from the same presynaptic input occur so closely together in time that they add together or sum 

Two EPSPs that occur simultaneously from different presynaptic inputs add together or sum

Two EPSPs from the same presynaptic input occur so closely together in time that they add together or sum

When multiple presynaptic neurons release neurotransmitter at various locations onto the postsynaptic neuron at the same time it results in: 

Cancellation 

Several action potentials

Spatial summation 

Suprathreshold hyperpolarization 

Temporal summation

Spatial summation

In neurophysiology, the term summation refers to the addition of: 

Action potentials at the node of Ranvier 

Excitatory neurotransmitter molecules at a receptor

 Presynaptic hyperpolarizations 

Postsynaptic potential changes in the dendrites and soma 

Resting membrane potentials in a particular area of the brain

:Postsynaptic potential changes in the dendrites and soma

Saltatory conduction is made possible by ________ 

Decremental action potentials 

Diphasic impulses

Erratic transmission of nerve impulses 

Large nerve fibers

 The myelin sheath

 The myelin sheath

Which of the following statements is most accurate concerning contiguous conduction? Contiguous conduction involves the impulse jumping over sections of the axon

 Contiguous conduction is faster than saltatory conduction in the same diameter axon Contiguous conduction is not subject to a refractory period 

Contiguous conduction occurs along myelinated nerve fibers

 Contiguous conduction travels from the axon hillock toward the axon terminal  

Contiguous conduction travels from the axon hillock toward the axon terminal

Which of the following statements is most accurate concerning contiguous conduction? Contiguous conduction involves the impulse jumping over sections of the axon 

Contiguous conduction is faster than saltatory conduction in the same diameter axon Contiguous conduction is not subject to a refractory period 

Contiguous conduction occurs along unmyelinated nerve fibers 

Contiguous conduction travels from the axon terminal toward the axon hillock

Contiguous conduction occurs along unmyelinated nerve fibers

Which of the following statements is most accurate concerning contiguous conduction? Contiguous conduction involves the impulse jumping over sections of the axon 

Contiguous conduction is faster than saltatory conduction in the same diameter axon Contiguous conduction is subject to a refractory period 

Contiguous conduction occurs along myelinated nerve fibers 

Contiguous conduction travels from the axon terminal toward the axon hillock 

Contiguous conduction is subject to a refractory period

Which of the following statements is most accurate concerning contiguous conduction? Contiguous conduction involves the impulse jumping over sections of the axon 

Contiguous conduction is not subject to a refractory period 

Contiguous conduction is slower than saltatory conduction in the same diameter axon Contiguous conduction occurs along myelinated nerve fibers 

Contiguous conduction travels from the axon terminal toward the axon hillock

Contiguous conduction is slower than saltatory conduction in the same diameter axon

Which of the following statements is most accurate concerning contiguous conduction?

Contiguous conduction involves the impulse traveling along the entire surface of the axon Contiguous conduction is faster than saltatory conduction in the same diameter axon Contiguous conduction is not subject to a refractory period

 Contiguous conduction occurs along myelinated nerve fibers

 Contiguous conduction travels from the axon terminal toward the axon hillock  

 Contiguous conduction involves the impulse traveling along the entire surface of the axon

Which of the following statements is most accurate concerning saltatory conduction? 

Saltatory conduction involves the impulse jumping from one neurolemmocyte to the neurolemmocyte 

Saltatory conduction is not subject to a refractory period 

Saltatory conduction is slower than contiguous conduction in the same diameter axon 

Saltatory conduction occurs along unmyelinated nerve fibers 

Saltatory conduction travels from the axon hillock toward the axon terminal

Saltatory conduction travels from the axon hillock toward the axon terminal

Which of the following statements is most accurate concerning saltatory conduction? 

Saltatory conduction involves the impulse jumping from one neurolemmocyte to the neurolemmocyte 

Saltatory conduction is not subject to a refractory period 

Saltatory conduction is slower than contiguous conduction in the same diameter axon 

Saltatory conduction occurs along myelinated nerve fibers 

Saltatory conduction travels from the axon terminal toward the axon hillock

Saltatory conduction occurs along myelinated nerve fibers

Which of the following statements is most accurate concerning saltatory conduction? 

Saltatory conduction involves the impulse jumping from one neurolemmocyte to the neurolemmocyte 

Saltatory conduction is slower than contiguous conduction in the same diameter axon 

Saltatory conduction is subject to a refractory period 

Saltatory conduction occurs along unmyelinated nerve fibers 

Saltatory conduction travels from the axon terminal toward the axon hillock  

 Saltatory conduction is subject to a refractory period

Which of the following statements is most accurate concerning saltatory conduction? 

Saltatory conduction involves the impulse jumping from one neurolemmocyte to the neurolemmocyte 

Saltatory conduction is faster than contiguous conduction in the same diameter axon 

Saltatory conduction is not subject to a refractory period 

Saltatory conduction occurs along unmyelinated nerve fibers 

Saltatory conduction travels from the axon terminal toward the axon hillock

 Saltatory conduction is faster than contiguous conduction in the same diameter

Which of the following statements is most accurate concerning saltatory conduction? 

Saltatory conduction involves the impulse jumping from one node of Ranvier to the adjacent node of ranvier 

Saltatory conduction is not subject to a refractory period 

Saltatory conduction is slower than contiguous conduction in the same diameter axon

 Saltatory conduction occurs along unmyelinated nerve fibers 

Saltatory conduction travels from the axon terminal toward the axon hillock

Saltatory conduction involves the impulse jumping from one node of Ranvier to the adjacent node of Ranvier

Which of the following is the correct statement about the action potential? 

An action potential does not have a refractory period 

An action potential is initiated at the axon terminal

 An action potential is initiated by in an increase in sodium permeability

 An action potential may be decremental (different magnitudes) 

Action potentials may be summed 

An action potential is initiated by an increase in sodium permeability

Which of the following is the correct statement about the action potential? 

An action potential does not have a refractory period 

An action potential is initiated at the axon hillock 

An action potential is initiated by in an increase in potassium permeability 

An action potential may be decremental (different magnitudes) 

Action potentials may be summed

An action potential is initiated at the axon hillock