Cardiovascular Physiology Quiz 1

What is the cardiac output from the left side of the heart primarily responsible for?

• Cerebral blood flow

• Coronary blood flow

• Systemic blood flow

• Pulmonary blood flow

Which blood vessels are the site of highest resistance in the cardiovascular system?

• Veins

• Capillaries

• Arterioles

• Arteries

What is the primary function of capillaries in the cardiovascular system?

• Store blood

• Exchange of nutrients, water, and gases

• Transport oxygenated blood

• Regulate blood pressure

Which equation expresses the relationship between blood flow, pressure gradient, and resistance?

• Q = R/ΔP

• Q = ΔP/R

• Q = ΔP × R

• Q = R + ΔP

What does Poiseuille’s equation describe?

• Cardiac output

• Blood flow

• Blood pressure

• Resistance of blood vessels

Which type of blood flow is characterized by streamlined movement?

• Turbulent flow

• Laminar flow

• Reversed flow

• Centrifugal flow

What is the primary determinant of pulse pressure?

• Heart rate

• Stroke volume

• Vascular resistance

• Blood viscosity

Which part of the heart is known as the pacemaker?

• Right atrium

• Sinoatrial (SA) node

• Left ventricle

• AV node

What does the QT interval on an ECG represent?

• Ventricular filling

• Heart rate

• Ventricular depolarization and repolarization

• Atrial depolarization

What is the effect of increased afterload on stroke volume?

• Increases heart rate

• Decreases stroke volume

• Increases stroke volume

• Has no effect on stroke volume