Chpater 10 Flashcards


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created 6 years ago by morfincarlos
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Autonomic system
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1

Which of the following does not describe the ANS?

a system of motor neurons that innervates all muscle cells

2

Preparing the body for the "fight-or-flight" response is the role of the ________.

sympathetic nervous system

3

Cardiovascular effects of the sympathetic division include all except ________.

dilation of the blood vessels serving the skin and digestive viscera

4

What differentiates an autonomic reflex from a somatic reflex?

a two-neuron motor pathway

5

Because many of the same cardiac cells are innervated by both parasympathetic and sympathetic fibers, the influence of the two divisions on the heart is synergistic.

False

6

The two divisions of the autonomic nervous system (ANS) normally have a(n) __________ relationship.

antagonistic

7

Which division of the nervous system has short preganglionic neurons?

sympathetic

8

The two types of receptors that bind acetylcholine are __________ and __________ receptors.

nicotinic; muscarinic

9

Beta-blockers ________.

decrease heart rate and blood pressure

10

Which autonomic neurons release norepinephrine as a neurotransmitter?

sympathetic postganglionic neurons

11

The craniosacral division is another name for the parasympathetic division.

True

12

Acetylcholine is the substance released by the axonal endings of the somatic efferent fibers and by the parasympathetic nerve fiber endings.

True

13

Emotions influence autonomic reactions primarily through integration in the ________.

hypothalamus

14

All visceral organs receive dual innervation from both the sympathetic and parasympathetic divisions of the ANS.

False

15

The sympathetic and parasympathetic divisions of the ANS have the same effect on most body organ systems.

False

16

The "resting and digesting" division of the autonomic nervous system is the ________.

parasympathetic division

17

Norepinephrine-releasing fibers are called cholinergic fibers.

False

18

Thermoregulatory responses to increased heat are mediated by the sympathetic nervous division.

True

19

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

hypothalamus

20

The autonomic nervous system may cause activation or inhibition, depending on the division that is active and the target that is affected.

True

21

Which of the following is responsible for the overall integration of the autonomic nervous system (ANS)?

hypothalamus

22

Which of the following is NOT associated with the parasympathetic division of the autonomic nervous system (ANS)?

emergency action

23

Sympathetic responses generally are widespread because ________.

NE and epinephrine are secreted into the blood as part of the sympathetic response

24

Which of the following is NOT an autonomic nervous system (ANS) effector?

skeletal muscle

25

For which of the following activities is the parasympathetic nervous system generally responsible?

resting and digesting