Psychobiology Exam 1

5.0(1)
learnLearn
examPractice Test
spaced repetitionSpaced Repetition
heart puzzleMatch
flashcardsFlashcards
Card Sorting

1/98

flashcard set

Earn XP

Description and Tags

Study Analytics
Name
Mastery
Learn
Test
Matching
Spaced

No study sessions yet.

99 Terms

1
New cards

action potential

a brief electrical charge that travels down an axon
Starts at the axon hilloks
is all of nothing

2
New cards

Adenosine Triphosphate (ATP)

compound used by cells to store and release energy

3
New cards

Anion

A negatively charged ion

4
New cards

anterograde transport

movement down the axon Away from soma (new proteins)
*A and A (away and anterograde)

5
New cards

Astrocyte

a glial cell that provides physical support, transports nutrients, increases blood flow, helps form synapses

6
New cards

Autonomic Nervous System

A part of the peripheral nervous system that provides the main neural connections to the internal organs.
consist of the Parasympathetic and Sympathetic nervous system

7
New cards

autoreceptors

signal the presynaptic neuron to stop releasing the neurotransmitter

8
New cards

Axon

A single extension from the nerve cell that carries the electrical signal from the cell body toward axon terminals.
Is in the conduction zone

9
New cards

Axon Hillock

the cone-shaped area on the cell body from which the axon originates

10
New cards

Axon Terminal

the end of an axon or axon collateral, which forms a synapse on a neuron or other target cell

11
New cards

behavioral intervention

-manipulating the behavior may affect the body and/or the brain
-Independent variable: Behavior
-Dependent variable: body/brain changes

12
New cards

brain

The mass of nerve tissue that is the main control center of the nervous system

13
New cards

Calcium

-Ca2+
-equilibrium potential= +120 mV
-is Cations

14
New cards

Cations

positively charged ions

15
New cards

cell body (soma)

-is part of the Integration Zone

16
New cards

Central Nervous System (CNS)

consists of the brain and spinal cord

17
New cards

c-fos

help visualize neuronal activity of cells

18
New cards

Chloride (Cl)

-equilibrium potential is -60 mV
-is an Anions

19
New cards

Concentration gradient

Movement from areas of high to low concentration

20
New cards

correlational studies

a research method that examines how variables are naturally related in the real world, without any attempt by the researcher to alter them or assign causation between them

21
New cards

Dendrite

an extension of the cell body that receives information from other neurons
part of the input zone

22
New cards

Diffusion

transmitter substance floats away from the synapse

23
New cards

Dualism

mind and body are separate

  • dual = two
24
New cards

Dynactin protein

transports back to soma in retrograde transport

25
New cards

electrostatic pressure

-Movement towards oppositely charged areas
-like charges repel and opposites attract

26
New cards

enzymatic degradation

the transmitter action is deactivated by an enzyme

27
New cards

equilibrium potential

The point at which the movement of ions across the cell membrane Is Balanced

28
New cards

EPSP (excitatory postsynaptic potential)

generated by depolarization
-Some ionotropic receptors allow Sodium to pass thru.

29
New cards

Exocytosis

Ca2+ entry causes the synaptic vesicles to fuse with the presynaptic membrane and release the neurotransmitter molecules into the synaptic cleft

30
New cards

falling phase

-Is a refractory period
-Potassium rushes out of the cell via voltage-gated potassium channels causing the membrane potential to become more negative

31
New cards

free nerve endings

respond to pain and temperature

32
New cards

glial cells

provide support and nutrients to neurons.

33
New cards

Golgi body

Packaging proteins in soma

34
New cards

Golgi stain

  • cell body stain
    -Only highlights certain cells
35
New cards

G protein

a protein coupled to a metabotropic receptor; activates a "second messenger" then communicates to areas within the cell to:
-open or close an ion channel in the membrane
-alter the production of proteins
-activate a gene in the nucleus via activation of transcription factors.

36
New cards

graded potential

A stimulus will cause small changes in the membrane potential.
The greater the stimulus, the greater the response (can vary in size)

37
New cards

Hyperpolarized phase

  • from -60mV to-70mV
  • Relative Refractory Period
    -potassium leaves the cell making it more negative
38
New cards

Immunocytochemistry

helps identify structure/proteins

39
New cards

IPSP (inhibitory postsynaptic potential)

-post synaptic hyperpolarizations because they decrease the likelihood that the neuron will fire
-Some ionotropic receptors allow Potassium or Chloride to pass thru.

40
New cards

Intracellular electrode

placed into an intracellular fluid to measure voltage

41
New cards

Ion

atoms or molecules with a (+) or (-) charge

42
New cards

Ion Channels

channel proteins that transport ions

43
New cards

Ion distribution

Determined by membrane pores (selective, open, closed), and types of ions (K ions pass-through more easily than Na or Ca)

44
New cards

Kinesin protein

moves vesicle across the microtubule in anterograde transport

45
New cards

levels of analysis

include somatic, behavior, and correlational intervention

46
New cards

Lysosome

degrades proteins
found in cell body

47
New cards

Merkel's disks

respond to isolated points

48
New cards

metabotropic receptors

receptors that act through a second messenger system

49
New cards

Microfilaments

"bones" of the neuron

50
New cards

Mitochondira

provides stored energy in the form of Adenosine triphosphate (ATP)

51
New cards

Monism

The mind is what your brain does

52
New cards

Motor Neuron

A neuron that transmits neural messages to muscles or glands.

53
New cards

Myelination

The fatty insulation around an axon, formed by glial cells. This sheath boosts the speed at which nerve impulses are conducted.

54
New cards

Neurotransmitter

chemical released by neurons that may, upon binding to receptors of neurons or effector cells, stimulate or inhibit them

55
New cards

Neurofilaments

"bones" of the neuron

56
New cards

Neuron

transmit an electrochemical signal

57
New cards

Neuron doctrine

Nervous system is made up of individual cells that are structurally, metabolically and functionally independent.

58
New cards

Oligodendrocyte

A type of glial cell that forms myelin in the CNS
-myelinate multiple axon

59
New cards

Nissil stain

stains organelles

60
New cards

parasympathetic nervous system

the division of the autonomic nervous system that calms the body, conserving its energy
Activated during non stressful conditions
Rest and restore

61
New cards

Pacinian corpuscles

respond to deep pressure and vibration

62
New cards

Postsynaptic Membrane

The specialized membrane on the surface of the cell that receives information by responding to neurotransmitter from a presynaptic neuron.

63
New cards

Passive ion channels

-Are Ion channels that are always open
-They do not require energy (no ATP is needed)

64
New cards

periphernal nervous system (PNS)

Made up of nerve tissue located outside the brain and spinal cord
consist of Somatic and autonomic nervous system

65
New cards

Presynaptic Membrane

the specialized membrane of the axon terminal of the neuron that transmits information by releasing neurotransmitter

66
New cards

Postsynaptic neuron

the neuron on the receiving end of the synapse

67
New cards

Potassium (K+)

-is Cation

  • equilibrium potential is -90 mV
68
New cards

Presynaptic neuron

neuron that sends the signal

69
New cards

Protein synthesis

-is an important function in SOMA
-Endoplasmic reticulum and Ribosome are protein synthesis

70
New cards

Proteins

are made up of one or more polypeptide that is twisted and folded into a unique shape

71
New cards

Reductionism

the reduction of complex systems to simpler components that are more manageable to study

72
New cards

Reference electrode

the electrode placed in extracellular fluid to measure voltage

73
New cards

Relative refractory period

whena neuron can generate another action potential but only by a stronger than normal stimulus

74
New cards

Resting membrane potential

The neuron is more negative inside relative to the outside of the cell (-60 mV)

75
New cards

Reuptake

a neurotransmitter's reabsorption by the sending neuron

76
New cards

ribosomes

translate genetic instructions from nucleus into specialized proteins needed for operation of a neuron

77
New cards

Ruffini corpuscles

detect stretch

78
New cards

Santiago Ramon Y Cajal

A pioneer in neuroscience that first demonstrated that the cells in the nervous system are Seperate and that they did not merge into each other as previously believed.

79
New cards

Schwann cells

a type of glial cell that forms myelin in the peripheral nervous system
-myelinate one axon
-Schw-ONE

80
New cards

Sodium (Na+)

-equilibrium potential is 55 mV
-is Cations

81
New cards

Sodium/Potassium pump

-an active mechanism which excludes 3 Na+ ions for every 2 K+ ions taken into the cell
-Requires energy supplied by adenosine triphosphate (ATP)

82
New cards

Somatic intervention

-manipulating the body and/or the brain may affect behavior
-Alteration of a structure or function to see how behavior is altered
-Independent variable: the structure or function that is being altered
-Dependent variable: the response that is measured, such as a behavior

83
New cards

Somatic nervous system

the division of the peripheral nervous system that controls the body's skeletal muscles

84
New cards

spatial summation

Integration by a postsynaptic neuron of inputs (EPSPs and IPSPs) from multiple sources.
-multiple signals go off creating an action potential

85
New cards

Sympathetic nervous system

-"Fight or flee
-Activated during arousal and stressful periods

86
New cards

Synapse

the cellular location at which information is transmitted from a neuron to another cell

87
New cards

Synaptic cleft

a gap into which neurotransmitters are released from the axon terminal

88
New cards

Acetylcholine

A neurotransmitter of the parasympathetic nervous system

89
New cards

temporal summation

Summation by a postsynaptic cell of input (EPSPs or IPSPs) from a single source over time.
-a single signal repreats one after the other creating an action potential

90
New cards

Terminal button

referred to as the output zone

91
New cards

transcription

DNA being copied to RNA in the nucleus

92
New cards

translation

Process by which mRNA is decoded and a protein is produced

93
New cards

Transmitter-gated ion channels

-is Ionotropic
-are composed of four or five subunits that have a pore in the middle that open quickly by the direct action of a neurotransmitter.
-Allow the passage of ions between the inside and outside of the cell.
-There are multiple subtypes that can either have an excitatory or inhibitory effect on the postsynaptic neuron.

94
New cards

unmyelinated axons

Sodium rushing in via voltage-gated sodium channels and depolarizes the membrane, which triggers the opening ofadjacent voltage-gated s odium channels.
-This process continues until the action potential reaches the terminal button.

95
New cards

Voltage -gated calcium channels

A membrane protein forming a pore that is permeable to Ca2+ ions and gated by depolarization of the membrane.

96
New cards

Voltage-gated potassium channels

Allow K+ to flow out of the cell, moving the potential back towards the negative equilibrium potential of potassium.

97
New cards

Voltage-gated sodium channels

-are present at the axon hillock
-At resting membrane potential (RMP, -60 mV), they are closed

98
New cards

Norepinephrine

A neurotransmitter of the sympathetic nervous system, involved in arousal.

99
New cards

retrograde transport

movement up the axon toward the soma (communicates metabolic needs and waste material)
*R and R (Return and Retrograde)