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Physiology > Nerve > Flashcards

Nerve Flashcards

(72 cards)

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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
innervates both intra and extrafusal fibers? (secondary)?
A. BETA
26
innervates intrafusal fibers (primary) and muscle spindle?
A. GAMMA
27
fast/acute pain and temperature fiber?
A. DELTA
28
preganglionic autonomic fiber?
B
29
slow/chronic pain and temperature postganglionic autonomic fiber?
C
30
what are the numerical types of neuron?
Ia, Ib, II, III, and IV
31
what numerical types of neuron has annulospinal nerve ending?
Ia
32
what numerical types of neuron has sensory neuron for golgi tendon organ?
Ib
33
what numerical type of neuron has sensory neuron for Golgi tendon organ?
Ib
34
what numerical type of neurons has secondary sensory neuron for muscle spindle?
II
35
AKA flower spray nerve endings numerical neuron?
II
36
AKA A. delta fiber numerical neuron?
III
37
what numerical type of neurons is fast/acute pain and temperature?
III
38
AKA C Fiber numerical neuron?
IV
39
what numerical type of neuron is slow/chronic pain and temperature?
IV
40
stretch reflex?
MUSCLE SPINDLE
41
inverse stretch reflex?
GOLGI TENDON ORGAN
42
muscle stretch stimulus?
MUSCLE SPINDLE
43
tension stimulus?
GOLGI TENDON ORGAN
44
muscle contraction response?
MUSCLE SPINDLE
45
muscle relaxation response?
GOLGI TENDON ORGAN
46
A. gamma, A. Beta motor neuron?
MUSCLE SPINDLE
47
A. alpha, A. beta motor neuron?
GOLGI TENDON ORGAN
48
Ia, II sensory neuron?
MUSCLE SPINDLE
49
Ib
GOLGI TENDON ORGAN
50
what are the phases of nerve action potential?
PHASE 1: DEPOLARIZATION PHASE 2: REPOLARIZATION PHASE 3: HYPERLARIZATION PHASE 4: RESTING MEMBRANE POTENTIAL
51
how much mv is required before firing level?
-50MV
52
what phase that causes opening of voltage-gated sodium channels?
PHASE 1: DEPOLARIZATION
53
Phase that promotes sodium influx?
PHASE 1: DEPOLARIZATION
54
what phase that the charge of cell becomes positive?
PHASE 1: DEPOLARIZATION
55
what phase that causes rapid closure of voltage-gated sodium channels and opening of voltage-gated channels potassium channels?
PHASE 2: REPOLARIZATION
56
what phase that the charge of the cell becomes negative?
PHASE 2: REPOLARIZATION
57
Phase promotes potassium efflux?
PHASE 2: REPOLARIZATION
58
Phase continues to be negative?
PHASE 3: HYPERLARIZATION
59
what phase that causes slow closure of voltage-gated potassium channels?
PHASE 3: HYPERLARIZATION
60
what phases that causes activation of sodium and potassium pump?
PHASE 4: RESTING MEMBRANE POTENTIAL
61
NA-K pump ratio?
3 NA OUT: 2 K IN
62
what phase that the charge of the cell returns to normal resting state?
PHASE 4: RESTING MEMBRANCE POTENTIAL
63
2 types of summation?
TEMPORAL SUMMATION SPATIAL SUMMATION
64
what is times in summation?
TEMPORAL SUMMATION
65
when a single nerve discharge action potential many times?
TEMPORAL SUMMATION
66
what is space in summation?
SPATIAL SUMMATION
67
when multiple nerves discharge action potential at the same time?
SPATIAL SUMMATION
68
2 types of refractory period?
ABSOLUTE REFRACTORY PERIOD RELATIVE REFRACTORY PERIOD
69
period during which a 2nd AP cannot be elicited even with a strong stimulus?
ABOSOLUTE REFRACTORY PERIOD
70
area between depolarization and repolarization or in the peak?
ABSOLUTE REFRACTORY PERIOD
71
starts at 1/3 of repolarization onwards?
RELATIVE REFRACTORY PERIOD
72
stronger than normal stimulus elicits new AP?
RELATIVE REFRACTORY PERIOD

Physiology (2 decks)

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