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Bio 12 > nervous review > Flashcards

nervous review Flashcards

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Biology 101 flashcards
1
Q

a motor neuron conducts impulses

A

from the central nervous system to muscles

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2
Q

in relax arc the nerve impulses is started

A

in sensory receptors

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3
Q

the sympathetic system is responsible for

A

emergency situations

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4
Q

what is cerebrum function

A

thinking memory

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5
Q

what is cerebellum function?

A

Muscle coordination

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6
Q

what is the thalamus function?

A

Sensory input

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7
Q

What is the hypothalamus function?

A

Homeostasis

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8
Q

What is the mid brains function?

A

Vision

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9
Q

what is the corpus callosum function?

A

Connects left and right hemispheres

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10
Q

What is medulla oblongata is function

A

Controls heart blood pressure, breathing

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11
Q

The peripheral nervous system contains

A

Cranial nerves and spinal nerves

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12
Q

The PNS is subdivided it into

A

Somatic an automatic system

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13
Q

The somatic system serves

A

Muskoskeletal system an extra sense organs

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14
Q

the autoatic system serves

A

internal body organs 

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15
Q

What are the two divisions of auto somatic system?

A

parasympathetic and sympathetic

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16
Q

when schwann cells wrap around an axon this is called

A

myelin sheath

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17
Q

Gaps where myelin is not present on a neuron is

A

node of ranveir

18
Q

an impulse, jumping from node to node is called

A

Saltatory conduction

19
Q

when an axon is not conducting an impulse, the inside of the neuron is

A

Negative and at -65 mv

20
Q

What does the sodium potassium pump do in resting potential?

A

maintain uneven distribution of Na and K ions am

21
Q

In resting potential where are sodium ions are pumped

A

Outside and potassium in

22
Q

what measures voltages during conductions of impulse

A

oscilloscope

23
Q

Two main functions of spinal cord t

A

Receives info and send messages to brain

24
Q

What is gray matter?

A

has unmyelinated cell bodies and contains interneuron

25
Q

what is white matter

A

have myelinated interneuron a that run together in tracts

26
Q

what does action’s potential mv change to

A

+40mv

27
Q

What is the membrane of the first neuron in a synapse called

A

presynaptic membrane

28
Q

What is the membrane of the next neuron in a synapse called

A

postsynaptic membrane

29
Q

what is the gap between two membranes called

A

synaptic cleft

30
Q

i when a nerve reaches a synaptic ending what happens

A

the membrane becomes permeable to calcium ions, causing milofilamenfs to pull vesicles

31
Q

what enzyme breaks down acetylcholine

A

acetylcholinesterase

32
Q

how are neurotransmitters removed

A

removed by enzymes or rapidly reabsorbed

33
Q

how many cranial nerves are there

A

12 pairs

34
Q

how many pairs of spinal nerves

A

31

35
Q

what do receptors do

A

receives environment stimulus

36
Q

what do effectors do

A

bring reaction to stimulus

37
Q

he neurotransmitte used by the sympathetic nervous system is:

A

norepinephrine

38
Q

outside of a neuron, the cytoplasm inside a resting neuron is :

A

negatively charged and the sodium ion concentration is lower inside than outside

39
Q

increased sodium ions and a decreased potassium ions is observed during

A

action potential downswing

40
Q

The distribution of sodium and potassium ions across the membrane of an axon is maintained by:

A

active transport

41
Q

resting potential, which of the following conditions exist outside the neuron?

A

excess potassium

42
Q

what event occurs during repolarization

A

potassium gates open

Bio 12 (46 decks)

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