Autonomic receptors

Question 1

Alpha 1

Answer 1

Gq
Increase vascular smooth muscle contraction
Increase pupillary dilator muscle contraction (Mydriasis)
Increase intestinal and bladder sphincter muscle contraction

Question 2

Alpha 2

Answer 2

Gi
Decrease sympathetic outflow (in CNS)
Decrease insulin release
Decrease lipolysis
Decrease aqueous humor production
Increase platelet aggregation

Question 3

Beta 1

Answer 3

Gs
Increase heart rate
Increase contractility
Increase renin release
Increase lipolysis

Question 4

Beta 2

Answer 4

Gs
Vasodilation
Bronchodilation
Increase lipolysis
Increase insulin release
Increase aqueous humor production
Decrease uterine tone
Ciliary muscle relaxation

Question 5

Beta 3

Answer 5

Gs
Increase Lipolysis
Increase thermogenesis in skeletal muscle

Question 6

M1

Answer 6

Gq
CNS
Enteric nervous system

Question 7

M2

Answer 7

Gi
Decrease heart rate
Decrease contractility of atria

Question 8

M3

Answer 8

Gq
Increase exocrine gland secretions (lacrimal, sweat, salivary, gastric acid)
Increase gut peristalsis
Increase bladder contraction
Bronchoconstriction
Increase pupillary sphincter muscle contraction (Miosis)
Ciliary muscle contraction (accommodation)

Question 9

D1

Answer 9

Gs

Relaxes renal vascular smooth muscle

Question 10

D2

Answer 10

Gi

Modulates transmitter release (esp. in brain)

Question 11

H1

Answer 11

Gq
Increase nasal and bronchial mucus production
Increase vascular permeability
Contraction of bronchioles
Pruritus
Pain

Question 12

H2

Answer 12

Gs

Increase gastric acid secretion

Question 13

V1

Answer 13

Gq

Increase vascular smooth muscle contraction

Question 14

V2

Answer 14

Gs

Increase H20 permeability and reabsorption in collecting tubules of kidney