SM54_AutonomicNervousSystem

Question 1

The ANS is composed of motor neurons to _________, _____ , and _____

Answer 1

smooth muscle, cardiac muscle, glands

Question 2

Locations of 1) Sympathetic nerves and 2) Parasympathetic nerves

Answer 2

Sympathetic: throughout the body – innervates smooth muscle tubes such as arteries, uretes, vas deferens, urethra, G.I. sphincters

Parasympathetic: head, neck, and body cavities. never found in branches of spinal nerves in the body wall

Question 3

Things the parasympathetic division is responsible for

Answer 3

1. returning body to / maintaining resting state - digestion, etc; 2. urination; 3. erection

Question 4

Sympathetic nervous system also called ________ outflow and the ________ system because main NT is ________

Parasympathetic nervous system also called ________ outflow and ________ system because main NT is _____

Answer 4

Sympathetic: thoracolumbar, adrenergic, norepinephrine

Parasympathetic: craniosacral, cholinergic, acetylcholine

Question 5

First and second cell body locations for sympathetic/parasympathetic

Answer 5

Sympathetic:
First cell body: lateral horn of spinal cord from levels T1-L2
Second cell body: sympathetic trunk, collateral ganglia (from the sympathetic trunk via thoracic and lumbar splanchnic nerves), or adrenal medulla cells

Parasympathetic:
First cell body: brain and lateral horn region of spinal cord at levels S2-S4
Second cell body: within walls of the organs they innervate

Question 6

Common NT across presynaptic sympathetic AND parasympathetic AND somatomotor neurons

Answer 6

acetylcholine

Question 7

Presynaptic parasympathetic neurons exit the CNS via:
a)
b)

Answer 7

Vagus nerve (for thoracic + abdominal viscera); pelvic splanchnic nerve (viscera of pelvis and hindgut)

Question 8

Differentiate general sensory nerves and visceral sensory nerves

Answer 8

General: sensory neurons in spinal nerves innervating the body wall.

Visceral: sensory neurons innervating splanchnopleure derivatives and other organs in body cavities. Visceral sensation is very dull compared to general sensory innervation

Question 9

Similarities between general sensory nerves and visceral sensory nerves:

Answer 9

cell bodies for both are in the dorsal root ganglia

Question 10

T or F: Visceral sensory nerves travel with all autonomic nerves in the body cavity

Answer 10

True

Question 11

Referred Pain

Answer 11

Pain originating from a visceral nerve in an organ that the brain senses as pain in a dermatome in the body wall from the same spinal segment as the visceral origin