Anp Ii Chapter 15: The Autonomic Nervous System And Visceral Reflexes

Front 1

The autonomic nervous system has __ and __ divisions.

Back 1

Sympathetic; parasympathetic

Front 2

Efferent pathways of the sympathetic nervous system have short __ fibers and long __ fibers

Back 2

preganglion; postganglion

Front 3

The two types of receptors for acetylcholine are __ receptors, found at neuromuscular junctions and __ receptors, found on most parasympathetic target cells.

Back 3

nicotinic; muscarinic

Front 4

The cells of the adrenal medulla behave like endocrine gland cells but are actually modified __.

Back 4

postganglionic neuron

Front 5

The parasympathetic nervous system issues its fibers through certain __ and sacral nerves.

Back 5

cranial

Front 6

A nerve fiber that secretes acetylcholine or a receptor that binds ACh is said to be __.

Back 6

cholinergic

Front 7

Many organs receive both sympathetic and parasympathetic fibers and, thus, are said to have __.

Back 7

dual innervation

Front 8

The __ of the brain controls many fundamental homeostatic mechanisms and exerts its control through autonomic efferent fibers.

Back 8

hypothalamus

Front 9

Whether a neurotransmitter has __ or __ effects depends on the type of receptor to which it binds.

Back 9

excitatory; inhibitory

Front 10

The __ is called the craniosacral division of the ANS.

Back 10

parasympathetic division

Front 11

Neurotransmitter of all preganglionic neurons in the ANS

Back 11

Acetycholine

Front 12

Maintains resting heart rate

Back 12

Parasympathetic tone

Front 13

Has short, unmyelinated postganglionic fibers

Back 13

Parasympathetic

Front 14

Modulate the effects of ACh and NE in the ANS

Back 14

Neuropeptides

Front 15

Breaks down norepinephirine

Back 15

Monoamine oxidase

Front 16

Released by adrenergic fibers in the sympathetic division

Back 16

Norepinephrine

Front 17

T/F
Sympathetic fibers that innervate sweat glands are cholinergic.

Back 17

True

Front 18

T/F
When norepinephrine binds to alpha receptors in blood vessels, the result is vasoconstriction.

Back 18

True

Front 19

T/F
Sympathomimetics can stimulate norepinephrine release.

Back 19

True

Front 20

T/F
Casodilation of cardiac and skeletal muscle blood vessels occurs as a result of acetylcholine binding to smooth muscle receptors.

Back 20

False

Front 21

T/F
Most organs in the body are innervated by either the sympathetic division or the parasympathetic division of the ANS.

Back 21

False

Front 22

T/F
Caffeine may make us more alert by blocking the actions of GABA, which makes us sleepy.

Back 22

False

Front 23

T/F
Both the ANS and somatic motor divisions contain unmyelinated axons:

Back 23

False

Front 24

Some cold medicines cause dilation of the bronchioles by binding alpha receptors to reduce swelling in nasal mucosa. These drugs are:

Back 24

Sympathomimetics

Front 25

Parasympathetic fibers to some salivary glands are carried over the:

Back 25

Facial nerve

Front 26

A cranial nerve involved in the baroreceptor reflex when blood pressure increases is the:

Back 26

Vagus

Front 27

Parasympatholytic drugs:

Back 27

inhibit ACh release

Front 28

Norepinephrine is secreted by most:

Back 28

sympathetic postganglionic fibers

Front 29

Because of __, the sympathetic division has more widespread effects than the parasympathetic division.

Back 29

Greater neural divergence

Front 30

The sympathetic division of the ANS produces all of the following effects except

Back 30

gastric secretion

Front 31

The cholinergic effects of the parasympathetic division are ecerted on most target cells through:

Back 31

Muscarinic receptors