Question 1
What is the effect of epinephrine on β3 receptors on the heart?
◦ Decreases coronary blood flow
◦ Supplements the effects of both β
1 and β
2 receptors
◦ Increases the strength of myocardial contraction
◦ Prevents overstimulation of the heart by the sympathetic nervous system
Question 2
Where in the heart are the receptors for neurotransmitters located?
◦ Semilunar and atrioventricular (AV) valves
◦ Endocardium and sinoatrial (SA) node
◦ Myocardium and coronary vessels
◦ Epicardium and AV node