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Physiology > Nerve > Flashcards

Nerve Flashcards

1
Q

convey action potential toward the cell body?

A

DENDRITES

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2
Q

collect/receives stimuli coming from/received by the dendrites?

A

CELL BODY

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3
Q

direct cell activity?

A

NUCLEUS

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4
Q

conveys action potential away from the cell body?

A

AXON

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5
Q

thick part of the axon that generates AP?

A

AXON HILLOCK

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6
Q

AP stands for?

A

ACTION POTENTIAL

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7
Q

first part next to the axon hillock?

A

INITIAL SEGMENT

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8
Q

acts as an insulator of electricity?

A

MYELIN SHEATH

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9
Q

makes nerve conduction faster?

A

MYELIN SHEATH

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10
Q

facilitates saltatory conduction?

A

NODES OF RANVIER

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11
Q

promotes sodium influx?

A

NODES OF RANVIER

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12
Q

AKA terminal feet?

A

TERMINAL ENDINGS

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13
Q

presynaptic terminal

A

TERMINAL ENDINGS

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14
Q

generates AP in a neuron?

A

AXON HILLOCK

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15
Q

generates AP in a motor neuron?

A

INITIAL SEGMENT

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16
Q

myelination neuron in the CNS?

A

OLIGODENDROCYTES

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17
Q

myelination neuron in the PNS?

A

SCHWANN CELLS

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18
Q

give me the 6 types of neuron fibers in alphabetical order.

A

A. ALPHA
A. BETA
A. GAMMA
A. DELTA
B
C

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19
Q

fast, large and myelinated fiber?

A

A. ALPHA

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20
Q

what are the largest and myelinated neuron fibers?

A

A. ALPHA
A. BETA
A. GAMMA

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21
Q

small and myelinated fibers?

A

A. DELTA
B

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22
Q

small and unmyelinated fiber

A

C

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23
Q

innervates extrafusal fibers (primary) and GTO?

A

A. ALPHA

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24
Q

what is GTO stands for?

A

GOLGI TENDON ORGAN

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25
Q

innervates both intra and extrafusal fibers? (secondary)?

A

A. BETA

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26
Q

innervates intrafusal fibers (primary) and muscle spindle?

A

A. GAMMA

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27
Q

fast/acute pain and temperature fiber?

A

A. DELTA

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28
Q

preganglionic autonomic fiber?

A

B

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29
Q

slow/chronic pain and temperature postganglionic autonomic fiber?

A

C

30
Q

what are the numerical types of neuron?

A

Ia, Ib, II, III, and IV

31
Q

what numerical types of neuron has annulospinal nerve ending?

A

Ia

32
Q

what numerical types of neuron has sensory neuron for golgi tendon organ?

A

Ib

33
Q

what numerical type of neuron has sensory neuron for Golgi tendon organ?

A

Ib

34
Q

what numerical type of neurons has secondary sensory neuron for muscle spindle?

A

II

35
Q

AKA flower spray nerve endings numerical neuron?

A

II

36
Q

AKA A. delta fiber numerical neuron?

A

III

37
Q

what numerical type of neurons is fast/acute pain and temperature?

A

III

38
Q

AKA C Fiber numerical neuron?

A

IV

39
Q

what numerical type of neuron is slow/chronic pain and temperature?

A

IV

40
Q

stretch reflex?

A

MUSCLE SPINDLE

41
Q

inverse stretch reflex?

A

GOLGI TENDON ORGAN

42
Q

muscle stretch stimulus?

A

MUSCLE SPINDLE

43
Q

tension stimulus?

A

GOLGI TENDON ORGAN

44
Q

muscle contraction response?

A

MUSCLE SPINDLE

45
Q

muscle relaxation response?

A

GOLGI TENDON ORGAN

46
Q

A. gamma, A. Beta motor neuron?

A

MUSCLE SPINDLE

47
Q

A. alpha, A. beta motor neuron?

A

GOLGI TENDON ORGAN

48
Q

Ia, II sensory neuron?

A

MUSCLE SPINDLE

49
Q

Ib

A

GOLGI TENDON ORGAN

50
Q

what are the phases of nerve action potential?

A

PHASE 1: DEPOLARIZATION
PHASE 2: REPOLARIZATION
PHASE 3: HYPERLARIZATION
PHASE 4: RESTING MEMBRANE POTENTIAL

51
Q

how much mv is required before firing level?

A

-50MV

52
Q

what phase that causes opening of voltage-gated sodium channels?

A

PHASE 1: DEPOLARIZATION

53
Q

Phase that promotes sodium influx?

A

PHASE 1: DEPOLARIZATION

54
Q

what phase that the charge of cell becomes positive?

A

PHASE 1: DEPOLARIZATION

55
Q

what phase that causes rapid closure of voltage-gated sodium channels and opening of voltage-gated channels potassium channels?

A

PHASE 2: REPOLARIZATION

56
Q

what phase that the charge of the cell becomes negative?

A

PHASE 2: REPOLARIZATION

57
Q

Phase promotes potassium efflux?

A

PHASE 2: REPOLARIZATION

58
Q

Phase continues to be negative?

A

PHASE 3: HYPERLARIZATION

59
Q

what phase that causes slow closure of voltage-gated potassium channels?

A

PHASE 3: HYPERLARIZATION

60
Q

what phases that causes activation of sodium and potassium pump?

A

PHASE 4: RESTING MEMBRANE POTENTIAL

61
Q

NA-K pump ratio?

A

3 NA OUT: 2 K IN

62
Q

what phase that the charge of the cell returns to normal resting state?

A

PHASE 4: RESTING MEMBRANCE POTENTIAL

63
Q

2 types of summation?

A

TEMPORAL SUMMATION
SPATIAL SUMMATION

64
Q

what is times in summation?

A

TEMPORAL SUMMATION

65
Q

when a single nerve discharge action potential many times?

A

TEMPORAL SUMMATION

66
Q

what is space in summation?

A

SPATIAL SUMMATION

67
Q

when multiple nerves discharge action potential at the same time?

A

SPATIAL SUMMATION

68
Q

2 types of refractory period?

A

ABSOLUTE REFRACTORY PERIOD
RELATIVE REFRACTORY PERIOD

69
Q

period during which a 2nd AP cannot be elicited even with a strong stimulus?

A

ABOSOLUTE REFRACTORY PERIOD

70
Q

area between depolarization and repolarization or in the peak?

A

ABSOLUTE REFRACTORY PERIOD

71
Q

starts at 1/3 of repolarization onwards?

A

RELATIVE REFRACTORY PERIOD

72
Q

stronger than normal stimulus elicits new AP?

A

RELATIVE REFRACTORY PERIOD

Physiology (2 decks)

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