ANS A&P

Question 1

Where do SNS cell bodies reside

Answer 1

T1-L3/ thoracolumbar region

Question 2

Describe preganglionic fibers in the SNS

Answer 2

Short, myelinated B fibers

Question 3

Describe postganglionic fibers in the SNS

Answer 3

Long, unmyelinated C fibers

Question 4

Where are SNS ganglia located

Answer 4

Near the spinal cord

Question 5

Where is acetylcholine the neurotransmitter

Answer 5

Both the SNS & PNS

Question 6

What is the post- to preganglionic ratio in the SNS

Answer 6

30:1

Question 7

What is the post to preganglionic ratio in the PNS?

Answer 7

3:1

Question 8

Where do the axons of sympathetic fibers exit the spinal cord

Answer 8

Via the ventral root alongside motor neurons

Question 9

what are the 5 second messenger molecules

Answer 9

• cAMP
• cGMP
• IP3
• DAG
• Ca⁺²

Question 10

The α2, M2 & M4, and D2 G protein coupled receptors are linked to ____________

Answer 10

Gi

Question 11

____________ is responsible for “turning on” a variety of protein kinases that instruct the cell to perform a specific function.

Answer 11

cAMP

Question 12

____________ metabolizes cAMP to AMP

Answer 12

phosphodiesterase

Question 13

which PDE is cAMP selective

Answer 13

PDE4

Question 14

which PDE is cGMP selective

Answer 14

PDE5

Question 15

Which PDE degrades both cAMP and cGMP?

Answer 15

PDE3

Question 16

primary mechanism that removes noreip from synaptic cleft

Answer 16

reuptake into the synaptic neuron (80%)