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Anatomy & Physiology II > Chapter 22: Autonomic Nervous System > Flashcards

Chapter 22: Autonomic Nervous System Flashcards

1
Q

What components are in the ANS?

A

Afferent (sensory) and Efferent (motor)

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2
Q

What are the major functions of the ANS?

A

Regulate heartbeat, smooth muscle contraction, glandular secretions, and metabolic functions

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3
Q

What is NOT a function of the ANS?

A

Muscle contraction

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4
Q

Preganglionic Neuron

A

Conducts impulses from the CNS to autonomic ganglion

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5
Q

Postganglionic Neuron

A

Efferent neuron with which a preganglionic neuron synapses within an autonomic ganglion

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6
Q

What are the 3 different paths that a preganglionic fiber may take?

A
  1. Synapse with sympathetic postganglionic neuron
  2. Send ascending or descending branches through the sympathetic trunk to synapse with postganglionic neurons in other chain ganglia
  3. Pass through one or more chain ganglia without synapsing
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7
Q

Where do parasympathetic preganglion neurons have cell bodies?

A

The nuclei in the brainstem or gray columns of the sacral cord

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8
Q

What do adrenergic fibers release?

A

Norepinephrine or epinephrine

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9
Q

What do cholinergic fibers release?

A

Acetylcholine

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10
Q

What divisions are tonically active?

A

Sympathetic and Parasympathetic

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11
Q

What is the major function of the sympathetic division?

A

Emergency fight-or-flight

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12
Q

What does acetylcholine stimulate?

A

Digestive gland secretion and smooth muscle of digestive tract

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13
Q

In parasympathetic, is the preganglionic axon long or short?

A

Long

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14
Q

In parasympathetic, is the postganglionic axon long or short?

A

Short

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15
Q

In sympathetic, is the preganglionic axon long or short?

A

Short

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16
Q

In sympathetic, is the postganglionic axon long or short?

A

Long

17
Q

The cholinergic fibers along the preganglionic axon in the parasympathetic division release acetylcholine that bind to what receptors on the ganglion?

A

Nicotinic

18
Q

The adrenergic fibers along the postganglionic axon in the sympathetic division release norepinephrine/epinephrine that bind to what receptors on the target?

A

Alpha and Beta receptors

19
Q

The cholinergic fibers along the postganglionic axon in the parasympathetic divixion release acetylcholine that bind to what receptors on the target?

A

Muscarinic

20
Q

The cholinergice fibers along the preganglionic axon in the sympathetic division release acetylcholine that bind to what receptors on the ganglion?

A

Nicotinic

Anatomy & Physiology II (9 decks)

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