Human Anatomy & Physiology: Chapter 13 Flashcards


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The Peripheral Nervous System and Reflex Activity
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1

The first level of neural integration in the somatosensory system is the __________ level.

receptor

2

__________ are collections of neuron cell bodies associated with nerves in the peripheral nervous system (PNS).

Ganglia

whereas nuclei are collections of neuron cell bodies in the CNS.

3

Spinal nerves are all classified as __________.

mixed nerves

All 31 pairs of spinal nerves are mixed nerves; they carry both afferent (sensory) impulses toward the CNS and efferent (motor) impulses away from the CNS.

4

Which of the following cranial nerves carries only sensory information?
abducens
olfactory
oculomotor
trigeminal

olfactory

5

What type of nerve fibers are found in the ventral ramus of a spinal nerve?

both sensory and motor

6

The primary nerve that controls breathing is found in which nerve plexus?

cervical

7

What parts of the brain ultimately plan and coordinate complex motor activities?

cerebellum and basal nuclei

8

Which reflex is important for maintaining muscle tone?

stretch reflex

9

Hiccups could occur if there was irritation or damage to the ______.

motor branches of ventral rami associated with the C3-C5 region of the spinal cord

10

Damage to the ulnar nerve could result in the inability to ______.

flex the wrist

11

A herniated lumbar disc could interfere with ______.
1. skin sensations from the lateral thigh
2. skin sensations from the medial thigh
3. adduction of the thigh
4. All of the listed responses are correct.

4. All of the listed responses are correct.

12

The brachial plexus can be palpated at the lower lateral border of the sternocleidomastoid muscle. Injury to the brachial plexus could cause weakness or paralysis to all of the following EXCEPT the ______.

sternocleidomastoid muscle