STRUCTURAL AND FUNCTIONAL ORGANIZATION OF THE AUTONOMIC NERVOUS SYSTEM

Question 1

What system?

(1) Controls skeletal muscle
(2) Conscious, voluntary control
(3) Motor pathway: one neuron from CNS to effector
(4) Does include sensory neurons (from skin, skeletal muscles, and special sense organs)
(5) All release the neurotransmitter acetylcholine (Ach)
(6) The axon of a single somatic motor neuron extends from CNS all the way to skeletal muscle fibers

Answer 1

Somatic Nervous System

Question 2

Three neurons in each pathway
Cell body #1 _____
Cell body #2______
Cell body #3 _____

Answer 2

in dorsal root ganglion
in spinal cord or brain stem
in thalamus; axon extends to cerebral cortex

Question 3

Anterior spinothalamic tracts sense what?

Answer 3

1) Light touch sensation

2) Deep pressure sensation

Question 4

Lateral spinothalamic tract senses what?

Answer 4

1) Pain Sensation

2) Temperature (hot vs cold) sensation

Question 5

Autonomic nervous system is regulated by what?

Answer 5

hypothalamus and brainstem

Question 6

Controls viscera: Smooth and cardiac muscle, and sweat and digestive glands
is unconscious, involuntary

Answer 6

Autonomic Nervous System

Question 7

what a re the two divisions of the autonomic system?

Answer 7

sympathetic (S) and parasympathetic (P)

Question 8

during S and P divisions what happens to
Heart
Digest

Answer 8

Heart
S= Stim
P= inhibit
Digestive organs
S= inhibit
P= stim

Question 9

during S and P divisions what happens to
Heart
Digest

Answer 9

Heart
S= Stim
P= inhibit
Digestive organs
S= inhibit
P= stim

Question 10

Sympathetic preganglionic neurons

what spinal chord segments?

Answer 10

T1 to L2

“thoracolumbar division”

Question 11

One sympathetic preganglionic axon can synapse with ______ postganglionic neuron cell bodies

Answer 11

20 or more

Question 12

What CN carries 80% of all P nerve impulses

Answer 12

Vagus nerves CN 10

Question 13

what CNs and spinal segments make up the preganglionic neurons

Answer 13

CN III, VII, IX, and X

S2-S4

Question 14

Parasympathetic postganglionic neurons provide what type of effect, due to being located within or near the innervated organ?

Answer 14

precise, localized (not widespread) effects

Question 15

these effects are these a result of ____

(a) Increase heart rate and contraction, and blood pressure (BP)
(b) Dilate pupils
(c) Dilate airways
(d) Dilate vessels to skeletal muscles, heart, liver and adipose tissue
(e) Constrict blood vessels to nonessential organs: skin, GI tract, kidneys
(f) Mobilize nutrients for energy: glucose and fats

Answer 15

Sympathetic Effects

Fight-or-flight activities

Question 16

these effects are these a result of \_\_\_\_
1) Salivation
2) Lacrimation
3) Urination
4) Digestion
5) Defecation
Decrease heart rate, airway diameter, pupil diameter

Answer 16

Parasympathetic Effects
(Rest-and-digest activities)
SLUDD

Question 17

That is the third order neuron?

Question 18

What neurotransmitter(s) are used for the parasympathetic division?

Answer 18

ACh

Question 19

What neurotransmitter(s) are used for the