Chapter 14

Question 1

All somatic motor neurons release what?

Answer 1

acetylcholine

Question 2

Somatic nervous system effect

Answer 2

stimulatory

Question 3

ANS

Answer 3

preganglionic fibers release ACh, postganglionic fibers release norepinephrine or ACh at effectors, effect is either stimulatory or inhibitory, depending on type of receptors

Question 4

Parasympathetic

Answer 4

promotes maintenance functions, conserves energy

Question 5

Sympathetic

Answer 5

mobilizes body during activity

Question 6

Role of parasympathetic

Answer 6

“rest and digest”

• blood pressure, heart rate, and respiratory rates are low
• gastrointestinal tract activity is high
• pupils constricted

Question 7

Role of sympathetic

Answer 7

“fight or flight”

-increased heart rate, dry mouth, cold, sweaty skin, dilated pupils

Question 8

Vagus nerve

Answer 8

account for 90% of all preganglionic parasympathetic fibers in body

Question 9

Cardiac plexus

Answer 9

slow heart rate

Question 10

Pulmonary plexus

Answer 10

serve lungs and bronchi

Question 11

Esophageal plexus

Answer 11

form anterior and posterior vagal trunks that sends branches to stomach liver, gallbladder, pancreas, small intestine, and part of large intestine

Question 12

Cholinergic receptors

Answer 12

nicotinic and muscarinic receptors