Grade 13 Heart Anatomy Quiz

What is the function of the superficial fibrous pericardium?

• To receive oxygenated blood from the lungs

• To separate the atria and ventricles

• To protect, anchor the heart, and prevent overfilling

• To pump blood to the lungs

Which chamber of the heart receives deoxygenated blood from the body?

• Right ventricle

• Left atrium

• Left ventricle

• Right atrium

What is the approximate size of the heart?

• The size of a fist

• The size of a watermelon

• The size of a tennis ball

• The size of a basketball

What is the function of the chordae tendineae in the heart?

• To open and close in response to pressure changes

• To anchor the cusps of the atrioventricular valves to papillary muscles

• To prevent backflow of blood into the atria

• To hold valve flaps in a closed position

What is the primary function of the coronary circulation?

• To control the blood pressure

• To regulate the heart rate

• To supply arterial blood to the heart muscle itself

• To deliver blood to the lungs

What is the main factor that affects stroke volume?

• Contractility

• Preload

• Afterload

• Heart rate

Which part of the autonomic nervous system opposes the effects of the sympathetic nervous system on heart rate?

• Sympathetic nervous system

• Enteric nervous system

• Parasympathetic nervous system

• Central nervous system

What is the main purpose of the atrioventricular valves during the cardiac cycle?

• To allow blood to flow from the ventricles to the atria

• To prevent backflow of blood into the atria

• To open the semilunar valves

• To relax the ventricles

What causes the dicrotic notch in the cardiac cycle?

• The closing of the atrioventricular valves

• The relaxation the ventricles

• The raising of aortic pressure as backflow rebounds off closed valve cusps

• The opening of the semilunar valves

What is the primary function of the electrocardiogram (ECG)?

• To detect electrical currents generated by the heart

• To regulate the heart rate

• To control the blood pressure

• To measure the volume of blood pumped out by each ventricle