Adrenergic Agonists/Agonists

Question 1

Alpha 1 receptor: tissue

Answer 1

• Most vascular smooth muscle

- Pupillary dilator muscle

Question 2

Alpha 1 receptor: actions

Answer 2

• vascular smooth muscle tissue: contracts (increase in vascular resistance)
• Pupillary dilator muscle: contracts (mydriasis (pupil dilation))

Question 3

Beta 1 receptor: tissue

Answer 3

• heart

- juxtaglomerular cells

Question 4

Beta 1 receptor: actions

Answer 4

• heart: stimulates rate (chronotropy) and force (contractility)
• JG cells: stimulates renin release

Question 5

Beta 2 receptor: tissue

Answer 5

• Respiratory, uterine, and vascular smooth muscle

- somatic motor nerve terminals (voluntary muscle)

Question 6

Beta 2 receptor: actions

Answer 6

• Relaxes respiratory, uterine, and vascular smooth muscle

- Causes muscle tremor

Question 7

Dopamine 1 receptor: tissue

Answer 7

Renal and other splanchnic blood vessels

Question 8

Dopamine 1 receptor: action

Answer 8

Relaxes blood vessels, reducing resistance