Coronary Circulation and Blood Flow Regulation Quiz

What is the primary goal of the ICU Advantage lessons?

• To offer cooking tips

• To teach basic anatomy

• To simplify complex critical care subjects

• To provide entertainment

Which side of the heart is primarily perfused during diastole?

• Both sides equally

• Neither side

• Left side

• Right side

What happens to coronary blood flow during systole on the left side of the heart?

• It reverses

• It remains constant

• It decreases

• It increases

What is the term for the increase in blood flow in response to increased oxygen demand?

• Passive hyperemia

• Active hyperemia

• Coronary dilation

• Vascular resistance

What is the primary way to increase oxygen delivery to the heart?

• Increasing CO2 levels

• Reducing blood pressure

• Decreasing heart rate

• Increasing blood flow

How does increased sympathetic activity affect myocardial oxygen demand?

• Decreases it

• Has no effect

• Increases it

• Reverses it

What is the effect of parasympathetic activity on coronary blood flow?

• Increases blood flow

• Reverses blood flow

• Decreases blood flow

• Has no effect

What role does adenosine play in coronary blood flow regulation?

• It decreases oxygen demand

• It has no effect

• It leads to vasodilation

• It causes vasoconstriction

What is the effect of nitric oxide on vascular smooth muscle?

• Causes contraction

• Decreases blood flow

• Leads to relaxation

• Increases tension

Which of the following is a potent vasoconstrictor in coronary vessels?

• Endothelium

• Oxygen

• Nitric oxide

• Adenosine