CH 13-14 - PNS & ANS - Practice Exam

Question 1

A major nerve of the lumbar plexus is the _____.

a.) iliohypogastric
b.) sciatic
c.) femoral
d.) iloinguinal

Answer 1

c.) femoral

Question 2

The “resting and digesting” division of the ANS is the _____.

a.) sympathetic division
b.) somatic division
c.) peripheral nervous system
d.) parasympathetic division

Answer 2

d.) parasympathetic division

Question 3

The secretions of the adrenal medulla act to supplement the effects of ____.

a.) neurosecretory substances
b.) sympathetic stimulation
c.) vagus nerve activity
d.) parasympathetic innervation

Answer 3

b.) sympathetic stimulation

Question 4

If the ventral root of a spinal nerve were cut, what would be the result in the tissue or region that nerve supplies?

a.) complete loss of sensation and movement
b.) complete loss of sensation
c.) complete loss of voluntary movement
d.) loss of neither sensation nor movement but only of autonomic control

Answer 4

c.) complete loss of voluntary movement

Question 5

Problems in balance may follow trauma to which nerve?

a.) vestibulocochlear
b.) trigeminal
c.) abducens
d.) accesory

Answer 5

a.) vestibulocochlear

Question 6

The patellar knee jerk is an example of a ___>

a.) extensor thrust reflex
b.) crossed-extensor reflex
c.) stretch reflex
d.) stress reflex

Answer 6

c.) stretch reflex

Question 7

Which of the following nerves does NOT arise from the brachial plexus?

a.) ulnar
b.) phrenic
c.) radial
d.) median

Answer 7

b.) phrenic

Question 8

Nerves that carry impulses toward the CNS only are ____.

a.) motor nerves
b.) afferent nerves
c.) mixed nerves
d.) efferent nerves

Answer 8

b.) afferent nerves

Question 9

Control of temperature, endocrine activity, and thirst are functions associated with the ____.

a.) hypothalamus
b.) thalamus
c.) cerebellum
d.) medulla

Answer 9

a.) hypothalamus

Question 10

Cardiovascular effects of the sympathetic division include all EXCEPT ____.

a.) constriction of most blood vessels
b.) increase of heart rate and force
c.) dilation of the blood vessels serving the skin and digestive viscera
d.) dilation of the vessels serving the skeletal muscles

Answer 10

c.) dilation of the blood vessels serving the skin and digestive viscera

Question 11

Sympathetic division stimulation causes ____.

a.) decreased blood glucose, increased GI peristalsis, and increased heart rate and blood pressure
b.) increased blood glucose, increased GI peristalsis, decreased heart rate and blood pressure
c.) decreased blood glucose, increased GI peristalsis, and decreased heart rate and blood pressure
d.) increased blood glucose, decreased GI peristalsis, and increased heart rate and blood pressure

Answer 11

d.) increased blood glucose, decreased GI peristalsis, and increased heart rate and blood pressure

Question 12

Which of the following does NOT describe the ANS?

a.) a system of motor neurons that innervates smooth and cardiac muscle and glands
b.) a system of motor neurons that innervates all muscle cells
c.) a general visceral motor system
d.) involuntary nervous system

Answer 12

b.) a system of motor neurons that innervates all muscle cells

Question 13

Which of the following is NOT a result of parasympathetic stimulation?

a.) dilation of pupils
b.) salivation
c.) elimination of urine
d.) increased peristalsis of the digestive viscera

Answer 13

a.) dilation of pupils

Question 14

The white rami communicantes ____.

a.) are unmyelinated
b.) carry postganglionic fibers to the periphery
c.) carry preganglionic axons to the sympathetic chain
d.) are found only in the C1-T1

Answer 14

c.) carry preganglionic axons to the sympathetic chain

Question 15

Parasympathetic functions include ____.

a.) a stimulation of heart rate and force contraction
b.) mobilizing storage energy sources
c.) allowing the body to cope with an external threat
d.) lens of accommodation for close vision

Answer 15

d.) lens of accommodation for close vision

Question 16

The somatic and autonomic nervous system differ in all of the following EXCEPT _____.

a.) all of the neurotransmitters
b.) their effectors
c.) to some degree in target responses to their neurotransmitters
d.) their efferent pathways

Answer 16

a.) all of the neurotransmitters

Question 17

Which of the following is the correct simple reflex arc?

a.) receptor, afferent neuron, integration center, efferent neuron, effector
b.) receptor, efferent neuron, integration center, afferent neuron, effector
c.) effector, efferent neuron, integration center, afferent neuron, receptor
d.) effector, afferent neuron, integration center, efferent neuron, receptor

Answer 17

a.) receptor, afferent neuron, integration center, efferent neuron, effector

Question 18

A patient who received a blow t the side of the skull exhibits the following signs and symptoms on that side of the face: he is unable to close his eyes, and the corner of his mouth droops. Which cranial nerve has been damaged?

a.) hypoglossal
b.) accessory
c.) glossopharyngeal
d.) facial

Answer 18

d.) facial

Question 19

Preparing the body for the “flight or flight” response si the role of the _____.

a.) somatic nervous system
b.) cerebrum
c.) sympathetic nervous system
d.) parasympathetic nervous system

Answer 19

c.) sympathetic nervous system

Question 20

A drug that might be used specifically to reduce heart rate in cardiac patients could be ____.

a.) epinephrine
b.) anticholinesterase
c.) norepinephrine
d.) a beta-blocker

Answer 20

d.) a beta-blocker

Question 21

Which of these effectors is NOT directly controlled by the ANS?

a.) smooth muscle
b.) most glands
c.) cardiac muscle
d.) skeletal muscle

Answer 21

d.) skeletal muscle

Question 22

The route of major parasympathetic outflow from the head is via the ____.

a.) sympathetic trunk
b.) sacral nerve
c.) phrenic nerve
d.) vagus nerve

Answer 22

d.) vagus nerve

Question 23

Which of the following statements is NOT true?

a.) sympathetic has extensive branching of preganglionic fibers: parasympathetic has minimal branching of preganglionic fibers
b.) sympathetic ganglia are within a few centimeters of the CNS; parasympathetic are close to visceral organs served.
c.) sympathetic origin is craniosacral; parasympathetic is thoracolumbar
d.) sympathetic division has short preganglionic and long postganglionic fibers; parasympathetic has long preganglionic and short postganglionic fibers

Answer 23

c.) sympathetic origin is craniosacral; parasympathetic is thoracolumbar

Question 24

Fibers that enter and leave the sympathetic chain without synapsing from structures called ____.

a.) spinal nerves
b.) gray rami communicantes
c.) white rami communicantes
d.) splanchnic nerves

Answer 24

d.) splanchnic nerves