Heart Anatomy Quiz

Where is the heart located in relation to the sternum?

• Anterior to the sternum

• Posterior to the sternum

• Directly on the sternum

• Below the sternum

What is the primary function of the heart?

• To store oxygen

• To circulate blood around the body

• To produce hormones

• To digest food

What happens during diastole in the cardiac cycle?

• The heart contracts and pumps blood

• The heart relaxes and fills with blood

• The heart stops beating

• The heart increases in size

What happens to the resting heart rate and stroke volume as a key adaptation to regular endurance exercise?

• Heart rate increases, stroke volume decreases

• Heart rate decreases, stroke volume increases

• Both heart rate and stroke volume increase

• Both heart rate and stroke volume decrease

What is the cardiac output of a well-trained individual with a stroke volume of 100 ml and a heart rate of 50 bpm?

• 3,000 ml

• 4,000 ml

• 5,000 ml

• 6,000 ml

What is the primary function of cardiac output during exercise?

• To decrease heart rate

• To increase stroke volume

• To meet the body's demand for oxygen

• To reduce blood pressure

What is atherosclerosis?

• A condition where blood vessels become more elastic

• A condition where arteries become coated with atheromatous plaques

• A condition where veins expand excessively

• A condition where capillaries merge into larger vessels

What is the role of the internal diameter of arteries?

• To decrease blood pressure

• To support high-pressure environment

• To increase blood flow speed

• To reduce blood volume

What is the role of smooth muscle in arteries?

• To decrease blood flow

• To allow expansion and recoil

• To increase blood viscosity

• To reduce blood pressure

What percentage of circulating blood do veins hold?

• One-third

• Two-thirds

• Half

• Three-quarters