Human Heart Structure Quiz

What is the unique property of cardiac muscle that allows it to contract and relax without any input from the nervous system or hormones?

• It is myogenic

• It is neurogenic

• It is cholinergic

• It is adrenergic

What is the function of coronary arteries in the heart?

• To supply the cardiac muscle with deoxygenated blood

• To supply the cardiac muscle with oxygenated blood

• To remove waste products from the heart

• To regulate the heart rate

What causes a heart attack or myocardial infarction?

• Low levels of glucose in the blood

• High levels of adrenaline in the blood

• Excessive oxygen supply to the cardiac muscle

• Blockages in the coronary arteries

Which chambers of the heart have thicker muscular walls, atria or ventricles?

• Neither have muscular walls

• Both have the same thickness

• Ventricles

• Atria

What is the function of the semilunar valves in the heart?

• To ensure unidirectional blood flow from the ventricles to the arteries

• To regulate the flow of oxygenated blood

• To prevent blood from flowing back into the atria

• To separate the left and right sides of the heart

Which blood vessel carries deoxygenated blood from the body back into the heart?

• Vena cava

• Pulmonary vein

• Pulmonary artery

• Aorta

What is the purpose of the septum in the heart?

• To produce red blood cells

• To store excess glucose

• To regulate blood pressure

• To separate oxygenated and deoxygenated blood

Which ventricle has a thicker muscular wall, left or right?

• Neither have muscular walls

• Left ventricle

• Right ventricle

• Both have the same thickness

What is the function of the atrioventricular valves in the heart?

• To ensure unidirectional blood flow from the ventricles to the arteries

• To separate the left and right sides of the heart

• To regulate the heart rate

• To prevent blood from flowing back into the atria

Which blood vessel carries oxygenated blood from the left ventricle to the rest of the body?

• Pulmonary vein

• Vena cava

• Pulmonary artery

• Aorta