Major ANS Receptor Types

Question 1

M2

Answer 1

• Gi
• decrease HR
• decrease contractility of atria

Question 2

M3

Answer 2

• Gq
• increase exocrine gland secretion
• increase gut peristalsis
• increase bladder contraction
• bronchoconstrction

Question 3

M4

Answer 3

• CNS neurons

- possibly vagal nerve endings

Question 4

M5

Answer 4

• vascular endothelium (esp cerebral)

- CNS neurons

Question 5

N

Answer 5

-skeletal mm NMJs

Question 6

Alpha 1

Answer 6

• Gq
• increase vascular smooth mm
• increase pupillary dilator contraction
• increase intestinal and bladder mm contracton

Question 7

Alpha 2

Answer 7

• Gi
• derease sympathetic flow
• decrease insulin release
• decreases lipolysis
• increase platele aggregation

Question 8

Beta 1

Answer 8

• Gs
• increase HR
• increase contractility
• increase renin release
• increase lipolysis

Question 9

Beta 2

Answer 9

• Gs
• vasodilation
• broncodialtion
• increase HR
• increase lipolysis
• increase insulin release
• decrease uterine tone
• ciliary mm relaxation
• increase aqeuous humor production

Question 10

D1

Answer 10

relaxes renal vascular smooth mm

Question 11

D2

Answer 11

modulates transmitter release (esp in brain)

Question 12

M1

Answer 12

• Gq
• CNS neurons
• enteric nervous system