Cardiovascular Physiology Quiz

What is vasoconstriction?

• Narrowing of blood vessel diameter due to contraction of smooth muscle

• Widening of blood vessel diameter due to relaxation of smooth muscle

• The volume of blood ejected by the left ventricle

• The resistance blood meets as it travels through the systemic circulation

What effect does vasodilation have on blood pressure?

• Increases blood pressure

• Decreases blood pressure

• Has no effect on blood pressure

• Causes blood pressure to fluctuate

What is stroke volume (SV)?

• The volume of blood pumped by the heart per minute

• The amount of blood ejected by the left ventricle during each contraction

• The resistance blood meets as it travels through the systemic circulation

• A condition in which blood flow is restricted to an organ

How is cardiac output (CO) calculated?

• Heart Rate (HR) × Systemic Vascular Resistance (SVR)

• Stroke Volume (SV) × Systemic Vascular Resistance (SVR)

• Heart Rate (HR) × Stroke Volume (SV)

• Stroke Volume (SV) × Contractility

What does an increase in systemic vascular resistance (SVR) usually do?

• Lowers blood pressure

• Raises blood pressure

• Has no effect on blood pressure

• Decreases stroke volume

What is contractility?

• The volume of blood pumped by the heart per minute

• The resistance blood meets as it travels through the systemic circulation

• The intrinsic strength of the cardiac muscle contraction at a given preload

• A condition in which blood flow is restricted to an organ

What is ischemia?

• A condition where blood flow is increased to an organ

• A condition in which blood flow is restricted to an organ

• The volume of blood ejected by the left ventricle

• The resistance blood meets as it travels through the systemic circulation

What leads to increased peripheral resistance and higher blood pressure?

• Vasodilation

• Stroke Volume

• Vasoconstriction

• Ischemia

What is influenced by preload, afterload, and contractility?

• Cardiac Output

• Stroke Volume

• Systemic Vascular Resistance

• Ischemia

What generally raises stroke volume and cardiac output?

• Decreased contractility

• Increased contractility

• Vasodilation

• Ischemia