Receptor Types in Adrenergic System

Question 1

Beta 1

Answer 1

1) Heart –> increase HR, increase force of contraction

2) Kidney–>renin secretion

Question 2

Beta 2

Answer 2

1) Arterioles (and arteries in skeletal muscle, coronary) –> dilation
2) Bronchial Muscle, Pregnant Uterus –> relaxation
3) Several Sites –> increased metabolism

Question 3

Beta 3

Answer 3

Adipose Tissue (lipocytes) –> increase lipolysis and thermogenesis

Question 4

Alpha 1

Answer 4

1) Arterioles in skin, mucosa, viscera, kidney (Resistance Vessels)–>constriction
2) Veins –> constriction
3) Uterus and spleen –> contraction

Question 5

Alpha 2

Answer 5

1) Presynaptic nerve endings –> inhibit NE Release and ACh Release (in the gut)
2) Postsynaptic in CNS –> decreased peripheral sympathetic tone

Question 6

Dopamine 1

Answer 6

Renal, mesenteric and cerebral arterioles –> dilation