Isuffer1

The brain and the spinal cord make up the \_____ nervous system.

central

The voluntary nervous system is also called the \_____ nervous system.

somatic

The scientific name for a nerve cell is \_____.

neuron

The fiber of a neuron that carries impulses toward the cell body is \_____.

dendrite

All the spinal nerves have both sensory and motor fibers. They are therefore described as \_____.

mixed

A group of nerve fibers located within the central nervous system is called a(n) \_____.

tract

Astrocytes and Schwann cells are examples of cells called \_____ or \_____ cells

neuroglia, glial

A sudden electrical change in the neuronal membrane that is transmitted along an axon is called a(n) \______ \______

action potential

During the depolarizing phase of the action potential, ions of the element \_____ enter the neuron through channels.

sodium

Nerve impulse conduction is faster in axons coated with \_____.

myelin

A point of junction between two nerve cells is a(n) \______.

synapse

\_____ are chemicals that transmit a signal across a synapse.

Neurotransmitters

The chemical that transmits the signal across the neuromuscular junction is called \_____.

acetylcholine

The dorsal and ventral horns of the spinal cord are part of the \_____ matter.

gray

Myelinated nervous tissue is described as \_____ matter.

white

Sensory impulses enter the \_____ horn of the spinal cord.

dorsal

A rapid, simple, automatic response that involves few neurons is a(n) \______

reflex, reflex ark

A neuron that leaves the spinal cord through the \_____ horn is carrying information away from the central nervous system.

ventral

A reflex that does not pass through the brain is termed a \_____ reflex.

spinal

The number of pairs of spinal nerves is \_____.

31

There are \_____ pairs of cervical spinal nerves.

8

The \_____ plexus supplies nerves to the pelvis and leg

lumbosacral

The sympathetic nervous system can be classified as \_____, based on the main neurotransmitters used.

adrenergic

The autonomic ganglia of the parasympathetic system are called \_____ \_____.

terminal ganglia

An increase in heart rate would be mediated by the \_____ branch of the autonomic nervous system.

sympathetic

Cholinergic cellular receptors bind \_____.

acetylcholine

The viral disease that infects motor neurons, leading to paralysis, is \_____.

poliomyelitis

Paralysis of both arms is called \_____.

diplegia

Ms. L developed numbness and paralysis following a viral infection. Lately, she has lost control of several involuntary functions, including bladder control. Her doctor has diagnosed a disorder of the spinal nerves called \_____-\_____ \_____.

Guillain-Barré syndrome

The word part -lemma means \_____.

sheath

Which of the following is NOT in the central nervous system?

A) tract

B) terminal ganglion

C) white matter

D) interneuron

B

The division of the nervous system that exclusively controls skeletal muscles is the

A) peripheral nervous system

B) central nervous system

C) somatic nervous system

D) autonomic nervous system

C

The part of the nervous system that consists of ALL of the spinal nerves and cranial nerves is the

A) peripheral nervous system

B) central nervous system

C) somatic nervous system

D) autonomic nervous system

A

Fibers that conduct impulses away from the cell body are called

A) dendrites

B) axons

C) cell bodies

D) neurilemma

B

Neurons that conduct impulses to the spinal cord and brain are called

A) motor neurons

B) interneurons

C) afferent neurons

D) association neurons

C

A nerve containing only efferent fibers is a(n)

A) sensory nerve

B) mixed nerve

C) motor nerve

D) nerve tract

C

The membrane surrounding an entire nerve is called the

A) perineurium

B) endoneurium

C) epineurium

D) neurilemma

C

A collection of neuron cell bodies outside the central nervous system is called a

A) nucleus

B) ganglion

C) tract

D) nerve

B

Which of the following is NOT an example of a neuroglial cell?

A) neuron

B) astrocyte

C) Schwann cell

D) All of the options are neuroglia.

A

Before the start of the action potential, the neuron membrane is

A) depolarized

B) repolarized

C) unpolarized

D) at rest

D

Potassium channels open late in the action potential to cause membrane

A) depolarization

B) potential

C) repolarization

D) degradation

C

The outermost membrane of the myelin sheath is called the

A) neurilemma

B) gray matter

C) dendrite

D) neuroglia

A

At a synapse, transmission usually occurs

A) from the postsynaptic cell to the presynaptic cell

B) between two postsynaptic cells

C) between two presynaptic cells

D) from the presynaptic cell to the postsynaptic cell

D

Neurotransmitters bind to specific proteins on the postsynaptic membrane called

A) transporters

B) receptors

C) linkers

D) channels

B