Exam 3 (Chapter 22) - Autonomic Nervous System

Question 1

Where are the cell bodies of the sympathetic preganglionic neurons located that play a role in the pupillary dilation?

Answer 1

Intermediolateral nucleus

Question 2

Where do the preganglionic neurons synapse with postganglionic neurons?

Answer 2

Autonomic ganglia

Question 3

What do sympathetic preganglionic axons enter the sympathetic trunk ganglion through?

Answer 3

Communicating branch

Question 4

A tissue innervated solely by the sympathetic division is the ________.

Answer 4

Blood vessels of skeletal muscle

Question 5

True or False: Cell Bodies of parasympathetic postganglionic neurons are located in the sympathetic trunk ganglia.

Answer 5

False

Question 6

Which statement is true regarding the autonomic innervation of the adrenal medulla?

Answer 6

Sympathetic preganglionic neurons innervate chromaffin cells in the medulla.

Question 7

What is pupillary constriction mediated by?

Answer 7

Parasympathetic nucleus of the oculomotor nerve.

Question 8

Horner’s syndrome results from a lesion involving ___________.

Answer 8

The cranial cervical ganglion

Question 9

What peripheral nerve triggers the contraction of the detrussor muscle of the bladder?

Answer 9

Pelvic nerve

Question 10

All preganglionic neurons of the sympathetic and parasympathetic divisions are ________.

Answer 10

Cholinergic

Question 11

When ACh binds to nicotinic receptors, what is their response?

Answer 11

Always excitatory

Question 12

When norepinephrine binds to beta-adrenergic receptors, what is their response?

Answer 12

Either excitatory or inhibitory

Question 13

Sympathetic postganglionic neurons innervating the heart release the neurotransmitter _________ that binds to ___________ receptors.

Answer 13

Norepinephrine; adrenergic (beta-1)

Question 14

True or False: Sympathetic fibers in the heart release norepinephrine that binds to beta-adrenergic receptors, while parasympathetic fibers release ACh that binds to muscarinic receptors.

Answer 14

True

Question 15

Activation of nAChRs result in generation of _________.

Answer 15

EPSP

Question 16

What is NOT a feature of Horner’s syndrome?

Answer 16

Strabismus

Question 17

Which muscle is innervated solely by the sympathetic division of the ANS?

Answer 17

Vascular smooth muscle

Question 18

Under the fight or flight situation, increase in contractility of cardiac muscle cells is mediated by adrenergic ________ receptors, while relaxation of bronchiolar smooth muscle is mediated by adrenergic ________ receptors.

Answer 18

beta-1; beta-2

Question 19

Which statement is correct?

A) Curare is an antagonist of cholinergic receptors

B) Atropine is an antagonist of adrenergic receptors

C) Strychnine is an antagonist of adrenergic receptors

Answer 19

Curare is an antagonist of cholinergic receptors

Question 20

Which statement about autonomic reflexes is false?

Answer 20

There are no autonomic reflexes related to the smooth muscle of the gut.