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Physiology > Chapter 9 Review > Flashcards

Chapter 9 Review Flashcards

0
Q

Astrocytes provide a protection of the brain called ______

A

Blood-brain barrier

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1
Q

At a synapse, the neuron that is sending the action potential is ______

A

Presynaptic

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2
Q

This lines the cavities of the brain in the CNS

A

Ependymal

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3
Q

Produces the myelin in the CNS

A

Oligo dendrocytes

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4
Q

Supports neurons in the ganglia

A

Satellite

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5
Q

Star shaped and supports neurons in the CNS

A

Astrocytes

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6
Q

Smallest size of the neuroglia

A

Microglia

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7
Q

Forms neurolemma and myelin in PNS

A

Schwann

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8
Q

The 3 functions of the nervous system are

A

Sensory, integration And motion

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9
Q

The synaptic cleft is the space that a _____

crosses to initiate a response in a post synaptic neuron

A

Neurotransmitter

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10
Q

What’s is the difference between a nerve and a tract?

A

Nerve-PNS
Tract- CNS
(Bundles of myelinated fibers)

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11
Q

The insulating material of a neuron in the PNS is ______

A

Myeline

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12
Q

Name 2 characteristics that would increase the speed of nerve transmission

A
  1. Warmer temp
  2. Larger diameter
  3. Has myelin
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13
Q

The body’s natural painkiller is _____

A

Endorphin

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14
Q

A neurotransmitter that helps regulate moods is

A

Seritonion

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15
Q

The “fight or flight” nervous system is _____

A

Sympathetic

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16
Q

Describe the arrangement if the gray a white matter in the spinal cord

A

Gray-inside-unmyelinated

White-outside- myelinated

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17
Q

Highly branched; input part of the neuron

A

Dendrite

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18
Q

Unmyelinated gap in the myelin sheath

A

Node of ravier

19
Q

Bundle of many axons in the CNS

A

Tract

20
Q

Neuron that conveys info from a receptor to the CNS

A

Sensory(afferent)

21
Q

Group of cell bodies in the CNS

A

Nucleus

22
Q

Neuron that conveys info from the CNS to an effector

A

Motor neuron (efferent)

23
Q

Produces myelin sheath in PNS

A

Shwann cells

24
Q

Group of cell bodies in PNS

A

Ganglia

25
Q

Long, cylindrical process that conducts impulses toward another neuron

A

Axon

26
Q

The portion of the neuron containing the nucleus

A

Cell body

27
Q

Sac in which the neurotransmitter is stored

A

Synaptic vesicle

28
Q

Neuron located entirely within the CNS

A

Interneuron

29
Q

Substance used for communication at chemical synapses

A

Neurotransmitter

30
Q

Bundle of axons in the PNS

A

Nerve

31
Q

Rounded structure s the distal end of an axon terminal

A

Synaptic end bulb

32
Q

This type of neuron take impulses to muscles

A

Motor (efferent)

33
Q

An axon carries an impulse _____ from a cell body

A

Away

34
Q

A neurotransmitter must cross the ______ to initiate an impulse in a postsynaptic neuron

A

Synaptic cleft

35
Q

A motor neuron is an example of a ____ nerve

A

Efferent

36
Q

A myelinated neuron appears what color?

A

White

37
Q

MS is more common in

A

Women

38
Q

Membrane where inner an outer surfaces have equal amounts of electrical charge

A

Depolarized

39
Q

Membrane where an inner and outer surfaces have unequal amounts of electrical charge

A

Polarized

40
Q

Time during which a neuron can’t be stimulated to initiate an impulse

A

Refractory period

41
Q

Ions found in high concentration inside the plasma membrane

A

k+ (potassium)

42
Q

Ions found in high concentration outside the plasma membrane

A

Na+ (sodium)

43
Q

The difference in electrical charges between the inside an outside of a plasma membrane

A

Resting potential (-70mV)

44
Q

The mechanism by which ions are moved through the plasma membrane from a lesser to greater concentration

A

Sodium pump

Physiology (16 decks)

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