Sympathetic vs Parasympathetic

Question 1

What is the function of the sympathetic (thoracolumbar) and parasympathetic (craniosacral) nervous systems?

Answer 1

fight or flight!
homeostasis
complement each other

Question 2

Where are the preganglionic somas located??

Answer 2

Sympathetic
thoracic T1-T12 (C8) and super lumbar L1-L3

Parasympathetic
brainstem and sacral spinal cord

Question 3

Where are the postganglionic somas located?

Answer 3

sympathetic
paravertebral ganglia (lateral to spinal cord) and prevertebral ganglia (abdominal cavity)

parasympathetics
near or in walls of target organs ^o^

Question 4

What is the length of the preganglionic and postganglionic fibers?

Answer 4

sympathetic
short arm, long fingers [synapse super fast]

parasympathetic
long arms, short fingers [synapse near the organ]

Question 5

What is the nt used at the preganglionic fiber?

Answer 5

Ach!!!

Question 6

What is the postganglionic receptor agonist?

Answer 6

for both: nicotinic (fast, ionotropic)

Question 7

What is the nt used at the postganglionic fiber?

Answer 7

sympathetic
NE and Epi (80% from adrenal medulla)
except!! sweat glands use Ach o.o

parasympathetic
Ach

Question 8

Receptor type?

Answer 8

sympathetic
adrenergic (slow, metabotropic)

parasympathetic
muscarinic (slow, metabrotopic)

*both slow for better control!