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Anatomy & Physiology, Quiz 4 > Quiz 4 > Flashcards

Quiz 4 Flashcards

1
Q

Two types of nerve cells

A

Neuron, neuroglia

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2
Q

Small cell that surrounds and wraps delicate neurons

A

Neuroglia (glial cells)

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3
Q

Excitable cells that transmit electrical signals

A

Neurons (nerve cells)

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4
Q

Four types of neuroglia in central nervous system

A

Astrocytes, microglial cells, ependymal cells, oligodendrocytes

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5
Q

Two types of neuroglia in peripheral nervous system

A

Satellite cells and Schwann cells

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6
Q

Most abundant neuroglia in CNS

A

Astrocytes

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7
Q

Small ovoid cells with thorny processes. Migrate toward injured neurons

A

Microglial cells

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8
Q

Line cerebrospinal fluid-filled cavities

A

Ependymal cells

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9
Q

Branched cells, processes wrap CNS nerve fibers. Forms insulating myelin sheath

A

Oligodendrocytes

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10
Q

Surround neuron cell bodies in PNS, function similar to astrocytes

A

Satellite cells

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11
Q

Surround peripheral nervous fibers, form myelin sheath, similar to oligodendrocytes

A

Schwann cells

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12
Q

Receptive regions

A

Dendrites

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13
Q

Impulse-generating and conductive region

A

Axon

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14
Q

Cone shaped area, start of an axon

A

Axon hillock

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15
Q

Long axons are called _______

A

Nerve fibers

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16
Q

Purpose of a myelin sheath

A

Insulate and protect nerve fiber, enhances impulse and speed.

17
Q

Node of ranvier

A

Gap in myelin sheath between adjacent Schwann cells.

18
Q

Ohm’s Law

A

Current (I) = Voltage (V) / Resistance (R)

19
Q

Current is (directly/inversely) proportional to voltage

A

Directly

20
Q

Current is directly/inversely) proportional to resistance

A

Inversely

21
Q

Highest velocity (300mph), largest axon diameter, highly myelinated

A

Type A

22
Q

Intermediate velocity (30mph), medium axon diameter, lightly myelinated

A

Type B

23
Q

Slowest velocity (2mph), smallest axon diameter, unmyelinated

A

Type C

24
Q

Four brain lobes

A

Frontal, parietal, occipital, temporal.

Anatomy & Physiology, Quiz 4 (1 decks)

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