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aa orgo > HESI Nervous Tissue > Flashcards

HESI Nervous Tissue Flashcards

1
Q

ER in a neuron is called ___ ___

A

Nissl bodies

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2
Q

axon meets the soma at the

A

axon hillock

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3
Q

the branches at the end of an axon are called

A

telodendria

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4
Q

the 3 functional classifications of neurons are sensory, motor, and

A

association or interneurons

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5
Q

type of neuron thats located in the CNS and work between sensory and motor neurons

A

interneurons

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6
Q

most common type of neuron (functional classification)

A

interneuron

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7
Q

a nerve fiber refers to

A

an axon

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8
Q

a bundle of axons is a

A

nerve

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9
Q

cell bodies are usually grouped into bundles called

A

ganglia

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10
Q

the outer layer that surrounds and entire nerve

A

epineurium

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11
Q

the middle layer that surrounds a bundle of axons

A

perineurium

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12
Q

layer surrounding each individual axon

A

endoneurium

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13
Q

a nerve ____ is a bundle of fibers in the CNS

A

nerve tract

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14
Q

neuroglia, CNS, have star shaped appearance

A

astrocytes

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15
Q

neuroglia, CNS, creates the myelin sheath

A

oligodendrocytes

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16
Q

neuroglia, CNS, phagocytic

A

microglia

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17
Q

neuroglia, CNS, line the fluid filled cavities in the CNS

A

ependymal cells

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18
Q

neuroglia, PNS, create the myelin sheath

A

schwann cells

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19
Q

neuroglia, PNS, surround the cell bodies

A

satellite cells

20
Q

axon potentials jumping from node to node is called ____ conduction

A

saltatory

21
Q

____ matter contains myelination

A

white

22
Q

_____ matter doesn’t have myelination

A

gray

23
Q

In an unstimulated nerve, the inside has a ___ charge compared to the outside

A

negative

24
Q

polarization of the unstimulated nerve is maintained by keeping lots of ___ ions on the outside and lots of ___ ions on the inside

A

Na

K

25
Q

The inside of the resting cell is negative mostly because of negative ____ and ____ ____ inside the cell

A

proteins and nucleic acids

26
Q

Ions can cross through the nerves membrane through ___ ____ in response to neurotransmitter, changes in membrane potential, etc

A

gated channels

27
Q

_____ potential describes the state of the neuron when it’s at -70 mv

A

resting potential

28
Q

a ____ _____ is a change in the resting potential of the plasma membrane in response to a stimulus

A

graded potential

29
Q

a nerve membrane depolarizes by opening channels that

A

let in Na

30
Q

if a stimulus opens up K+ gated channels, the membranes becomes _____

A

hyperpolarized

31
Q

unlike a graded potential, an ____ ____ can travel long distances

A

action potential

32
Q

_____ is the opposite of resting potential because now K is on the outside and Na is on the inside

A

repolarization

33
Q

In this period, the Na and K are still in switched positions, so the cell won’t respond to another stimulus yet

A

refractory

34
Q

chemical synapse, when an action potential reaches the end of an axon, the ______ of the membrane causes gated channels to open the allow __ to enter

A

Ca2+

35
Q

chemical synapse, the influx of Ca2 into the terminal end causes _____ ____ to release a ______

A

synaptic vesicles

neurotransmitter

36
Q

chemical synapse, if the neurotransmitter allows more Na and Ca to enter the postsynaptic cell

A

an action potential is generated (cell is excited)

37
Q

chemical synapse, the neurotransmitter allows K to exit or Cl- to enter the postsynaptic cell

A

an action potential is probably stoped

38
Q

common neurotransmitter, commonly stimulates muscles to contract by opening gated positive ion channels

A

ACh

39
Q

common neurotransmitter, derived from amino acids and are secreted mostly between neurons of the CNS (4 of them)

A

epinephrine, norepinephrine, dopamine, serotonin

40
Q

common neurotransmitter, a common inhibitory transmitter

A

GABA

41
Q

What area of the brain deals with understanding written or verbal speech?

A

Weirnecke’s area

42
Q

The sodium-potassium pumps moves how many of each ion at a time

A

3 sodium out

2 potassium in

43
Q

nerve that stimulates the diaphragm

A

phrenic

44
Q

nerve for the anterior arm and lateral forearm

A

musculocutaneous

45
Q

nerve for anterior forearm and some of the hand

A

median nerve

46
Q

nerve for the medial thigh

A

obturator nerve

47
Q

nerve for the perineum

A

pudendal neve

aa orgo (196 decks)

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