Sympathetic receptors and functions** Flashcards
1
Q
3 main functions of A1 stimulation
A
- Increased vascular SM contraction–> Increased BP and peripheral vascular resistance
- Mydriasis (pupillary dilator muscle contraction)
- Increased bladder sphincter contraction (and intestines)
2
Q
main 4 functions of A2 stimulation
A
- Decreased sympathetic outflow–> stimulates A2 autoreceptor on presynaptic nerves to reduce NE release
- Decreased insulin release (Beta cells of pancreas)
- Decreased lipolysis
- Increased platelet aggregation
3
Q
main 3 functions of B1 stimulation
A
- Increased HR and contractility
- Increased renin release by kidney
- Increased lipolysis
4
Q
main 5 functions of B2 stimulation
A
- Vasodilation
- Bronnchodilation
- Increased lipolysis
- Increased insulin release (beta cells)
- Decreased uterine tone
*HR will increase reflexively
