- Beta 1 receptors:
- Increase heart rate, speed atrial-ventricular conduction, > strength of cardiac contraction
- Increased secretion of renin--> increased BP and fluid retention.
Basically increases whatever the heart and kidneys would normally do.
- Beta 2 Receptors:
- Relaxation of bronchial smooth muscle
- Vasodilation of blood vessels and shunting of blood in and to skeletal muscle, brain and heart. Redirecting blood from perifery to core.
Relaxation of uterine smooth muscle. Used to prevent premature birth of child. Other effects are complementary to mother and child.