The Autonomic Nervous System and Visceral Sensory Neurons Flashcards


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1

Which of the following statements best describes the anatomical organization of the somatic and autonomic divisions of the peripheral nervous system?

The somatic nervous system has one neuron from the central nervous system to the target tissue, while the autonomic nervous system is set on a two-neuronal relay.

2

Which disorder of the ANS is characterized by drooping of the upper eyelid, pupil constriction, flushing of the face, and inability to sweat on the affected side of the body?

Horner's syndrome

This is a condition that follows damage to the sympathetic trunk in the inferior cervical region on one side of the body.

3

Which region of the spinal cord does NOT contain any autonomic neurons?

cervical

The cervical region is the only region that does not contain preganglionic sympathetic neuronal cell bodies.

4

Which of these statements accurately describes how the general visceral motor system of the autonomic nervous system (ANS) differs from the general somatic motor system?

Motor units in the ANS include a chain of two motor neurons.Submit

5

The ANS is the system of __________ neurons that regulates such functions as __________.

motor / heart rate, digestion, and blood pressure

6

Which of these organs/tissues are NOT innervated by parasympathetic fibers, or do not exhibit parasympathetic effects?

sweat glands, arrector pili muscles, and adipose tissue

7

Activation of the sympathetic division of the ANS causes__________of bronchioles.

dilation

8

If you were very nervous about speaking in front of a group of people, which of the following would be likely to develop?

dry mouth, due to sympathetic inhibition of secretions from the salivary glands

9

Stimulation of the vagus nerve in the baroreceptor reflex causes __________.

decreased heart rate

10

The CNS structure that is the main integration center of the ANS is the__________.

hypothalamus

11

__________disease is characterized by intermittent attacks of exaggerated sympathetic vasoconstriction of blood vessels of the hands and feet, followed by vasodilation.

Raynaud'sSubmit

12

Where do sympathetic preganglionic fibers synapse?

sympathetic trunk and collateral ganglia

Sympathetic preganglionic fibers synapse in the sympathetic trunk ganglia or in the collateral ganglia (celiac, superior mesenteric, inferior mesenteric, and inferior hypogastric ganglia).

13

Where are cell bodies of somatic motor neurons located?

ventral horn of spinal cord

In the spinal cord, the cell bodies of somatic motor neurons are located in the ventral horn gray matter.

14

The parasympathetic division of the autonomic nervous system (ANS) is characterized by __________.

localized effects on specific organs and short postganglionic axons near organ of innervation

15

The sympathetic division of the ANS is also known as the__________division.

thoracolumbar

16

Almost all postganglionic neurons of the sympathetic division release__________.

norepinephrine

17

Which of these statements accurately describes a similarity between the sympathetic and parasympathetic divisions of the ANS ?

They innervate many of the same visceral organs.

18

Postganglionic sympathetic fibers to sweat glands and peripheral blood vessels secrete _________.

acetylcholine

These are the examples of postganglionic fibers that do not secrete norepinephrine.

19

The general visceral motor division of the peripheral nervous system describes the

autonomic nervous system.

20

Cell body of this autonomic neuron lies outside the CNS.

post-ganglionic neuron

21

Cell body of this autonomic neuron lies within the CNS.

pre-ganglionic neuron

22

Division that is dominant during exercise, excitement, or emergencies.

sympathetic

23

Another name for the ANS is the

general visceral motor system

24

Which of these is not innervated by the ANS?

skeletal muscle

25

Which of these characteristics definitively distinguishes the autonomic nervous system from the somatic nervous system?

cell bodies outside the CNS

26

Which of these descriptions is not a result of parasympathetic stimulation?

production of goose bumps

27

Cell bodies of the preganglionic sympathetic neurons are located within the

lateral gray horns of the spinal cord

28

Which autonomic division increases heart rate?

sympathetic

29

Which cranial nerve carries parasympathetic innervation to the thoracic and abdominal viscera?

CN X

30

Which of these statements describing cranial nerves with parasympathetic outflow is accurate?

Cranial nerve VII, which synapses in the pterygopalatine ganglion, regulates nasal secretions and tear production.

31

The functions of the vagus nerves include __________.

stimulation of glandular secretions from digestive and accessory digestive organs and increased motility of the digestive tract

The vagus nerve is a critically important nerve for regulating parasympathetic functions. The vagus nerves contain over 90% of the preganglionic parasympathetic fibers in the body.

32

Effects caused by stimulation of the parasympathetic division include __________.

erection, contraction of smooth muscle of bladder wall, and increased motility of digestive organs

33

Division of the ANS responsible for the fight-or-flight response describes the

sympathetic division.

34

Division of the ANS most active during vigorous exercise describes the

sympathetic division.

35

Division of the ANS most active when the body is at rest describes the

parasympathetic division.

36

This division can also be called the craniosacral division.

parasympathetic division

37

Division that is dominant during rest, digestion, and excretion.

parasympathetic

38

A descriptive term that identifies the type of neurotransmitter released by sympathetic postganglionic fibers.

adrenergic

39

A class of preganglionic fibers present in both sympathetic and parasympathetic divisions.

cholinergic

40

Focusing the eye on a nearby object in the field of vision is a function of which division of the ANS?

parasympathetic

41

All of the following have only sympathetic innervation except the

salivary glands

42

Which of these is not a characteristic of the parasympathetic division?

branched fibers