Lecture 8: Autonomic NS

Question 1

what is the main structural difference b/w somatic vs autonomic NS

Answer 1

the ANS is a 2 neuron system with a pre and post ganglionic neuron

Question 2

what type of receptor is present in all preganglionic neurons in the ANS

Answer 2

cholinergic (ACh is the NT)

Question 3

what type of receptor is present in all postganglionic parasympathetic fibers

Answer 3

cholinergic

Question 4

the majority of postganglionic SYMPATHETIC fibers are what type

Answer 4

adrenergic (NE is NT)

Question 5

nicotinic receptors are also ______ channels

Answer 5

Ligand-gated Na+ channels

Question 6

what is meant by tonic activity in the ANS

Answer 6

tonic activity refers to steady, sustained responses that are active under normal conditions

Question 7

what is meant by reflex activity in the ANS

Answer 7

reflex activity is a response to a change in the environment

Question 8

when both the SNS and PNS promote the same physiological goal, it is called _____ effect

Answer 8

cooperative