Receptor Types

Question 1

mAChRs Locations

Answer 1

Parasympathetic: eye, heart, lungs, bladder, GI tract, reproductive organs

Sympathetic: skin

Question 2

Alpha 1 ARs Locations

Answer 2

Sympathetic: eye, blood vessels, bladder, prostate, penis

Question 3

Beta 1 AR Locations

Answer 3

Sympathetic: heart and kidneys

Question 4

Beta 2 AR Locations

Answer 4

Sympathetic: lungs, liver, skeletal muscle, uterus, arterioles

Question 5

Activation of nicotinicN

Answer 5

1) activation of post ganglionic neurons
2) release of epinephrine

Question 6

Activation of nicotinicM

Answer 6

1) contraction of skeletal muscle

Question 7

Activation of mAChRs

Answer 7

1) eye -> miosis (contract ciliary and iris sphincter muscles)
2) heart -> decrease HR
3) lung -> increased secretions and bronchoconstriction
4) bladder -> increased voiding
5) GI -> increased salivation, secretion, motility, defecation
6) sex -> erection
7) sweat glands -> increased sweating
8) dilation of blood vessels

Question 8

Activation of alpha 1 ARs

Answer 8

1) eyes -> mydriasis (pupil dilation)
2) arterioles-> increased vasoconstriction
3) bladder -> decreased voiding (contract tricorne & sphincter)
4) penis -> ejaculation

Question 9

Activation of Beta 1 ARs

Answer 9

1)heart -> increased HR, force of contraction and AV conduction velocity
2) kidney -> increased renin release -» increased BP

Question 10

Activation of Beta 2 ARs

Answer 10

1) arterioles (heart, lung, skeletal muscle) -> vasodilation
2) bronchi -> bronchodilation
3) uterus -> relaxation
4) liver -> promotes glycogenlysis
5) skeletal muscle -> increased contraction

Question 11

Activation of alpha 2 ARs

Answer 11

1) presynaptic neurons of NE-releasing cells -> decreased NE release (feedback inhibition)