S1: Non-Muscarinic Blocking Agents

Question 1

Effects of a1 blockers

Answer 1

• Contraction of seminal vesicles
• Contraction of iris muscle = dilated pupil
• Contraction of pilomotor muscle

Question 2

Effects of blocking B1

Answer 2

Slowing heart rate: 
	reduces arrhythmia
	improves perfusion
	reduces demand
Kidney
	Less renin production

Question 3

Effects of B2 receptor

Answer 3

Relaxation of Smooth muscle
Especially airways
Skeletal muscle vasculature
Coronary and cerebral blood vessels
Bladder