Heart Anatomy and Physiology Quiz

What is the primary function of the right side of the heart?

• To receive deoxygenated blood from the body

• To pump oxygenated blood to the body

• To regulate the heart's electrical activity

• To supply the heart muscle with blood

Which valve does blood pass through when moving from the right atrium to the right ventricle?

• Pulmonary valve

• Mitral valve

• Aortic valve

• Tricuspid valve

What is the primary role of the left ventricle?

• To receive blood from the body

• To pump blood to the lungs

• To regulate the heart's electrical activity

• To pump oxygenated blood to the body

What happens when a coronary artery becomes blocked?

• The heart beats faster

• A heart attack occurs

• The heart muscle contracts more forcefully

• Blood flow to the lungs increases

Where does the electrical activity of the heart typically begin?

• In the Purkinje fibers

• In the bundle of His

• In the sinoatrial node

• In the atrioventricular node

What is the role of the atrioventricular node in the heart?

• To pump blood to the lungs

• To initiate the heartbeat

• To delay the electrical signal

• To supply blood to the heart muscle

What is the function of the Purkinje fibers in the heart?

• To regulate blood pressure

• To initiate the heartbeat

• To conduct electrical signals throughout the ventricles

• To supply blood to the heart muscle

What is depolarization in the context of heart muscle cells?

• The change in electrical charge that leads to contraction

• The resetting of the membrane potential

• The movement of ions out of the cell

• The process of muscle relaxation

During repolarization, which ions are primarily involved in resetting the membrane potential?

• Magnesium and potassium

• Sodium and calcium

• Potassium and calcium

• Chloride and sodium

What is the normal resting membrane potential of heart muscle cells?

• -70 mV

• 0 mV

• +30 mV

• -90 mV