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Exam 10: The Nervous System: Introduction, Spinal Cord, and Spinal Nerves

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Question 21

Multiple Choice

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​The final nerve cell that receives the impulse and brings about the reaction to the original stimulus is called the motor or ____ neuron.

A) ​afferent
B) ​inter
C) ​bipolar
D) ​efferent

E) C) and D)
F) B) and C)

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Question 22

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​There are ____ pairs of cervical nerves.

A) ​10
B) ​8
C) ​12
D) ​6

E) B) and C)
F) B) and D)

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Question 23

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​A bundle of nerve cells or fibers is called a ____.

Nerve cell bodies found outside the central nervous system are called ____.​

The ____________________ of a Schwann cell contains the cell's nucleus and most of its cytoplasm, which remain outside the myelin sheath.​

Matching ​Match the description with the corresponding term. a.​astrocytes b.​Schwann cells c.​acetylcholine d.​ventral root e.​neuron f.​microglia g.​white matter h.​action potential i.​afferent neuron j.CNS -​transmits nerve impulses

​The ____ act like the male sex hormones.

Matching ​Match the description with the corresponding term. a.​astrocytes b.​Schwann cells c.​acetylcholine d.​ventral root e.​neuron f.​microglia g.​white matter h.​action potential i.​afferent neuron j.CNS -​star-shaped cells of the CNS

Descending tracts of the central nervous system that conduct impulses down the spinal cord are concerned with ____ functions.​

​The smallest and simplest pathway able to receive a stimulus and produce a response is the ____________________.

Over 60% of all brain cells are neurons.​

Cells that line the fluid-filled ventricles of the brain, some of which produce cerebrospinal fluid, are called ____.​

​Star-shaped cells that form a supporting network in the brain and spinal cord are called ____.

Matching ​Match the description with the corresponding term. a.​astrocytes b.​Schwann cells c.​acetylcholine d.​ventral root e.​neuron f.​microglia g.​white matter h.​action potential i.​afferent neuron j.CNS -​consists of the brain and spinal cord

​Myelin sheaths surrounding nerve fibers in the peripheral nervous system are produced by ____.

Neurons that convey information from receptors in the periphery of the body to the brain and spinal cord are known as ____________________ neurons.​

The parasympathetic division of the autonomic nervous system stimulates the body's vegetative activities such as digestion, urination, and defecation.​

Matching ​Match the description with the corresponding term. a.​astrocytes b.​Schwann cells c.​acetylcholine d.​ventral root e.​neuron f.​microglia g.​white matter h.​action potential i.​afferent neuron j.CNS -​contains motor nerve fibers only

​The nerve fibers on the nerve cell that receive signals are called ____________________.

An unmyelinated nerve fiber conducts an impulse over its entire length with a slower rate of conduction than that of a myelinated fiber.​