IB Biology Heart

What is the main function of the left ventricle?

• To pump oxygenated blood to the lungs

• To receive deoxygenated blood from the body

• To pump oxygenated blood to the body

• To receive oxygenated blood from the lungs

What is the function of the coronary arteries?

• To supply oxygenated blood to the heart muscle

• To remove deoxygenated blood from the heart muscle

• To supply oxygenated blood to the lungs

• To remove deoxygenated blood from the lungs

What is the primary function of the septum in the heart?

• To separate the left and right atria

• To separate the left and right ventricles

• To prevent the mixing of oxygenated and deoxygenated blood

• To regulate the heartbeat

What is the role of the aorta in the circulatory system?

• To carry deoxygenated blood from the heart to the lungs

• To carry oxygenated blood from the heart to the body

• To carry deoxygenated blood from the body to the heart

• To carry oxygenated blood from the lungs to the heart

During a biology class, Laura was asked to identify the layer of the heart wall synonymous with the visceral layer of the pericardium. What is it known as?

• myocardium

• endocardium

• epicardium

• parietal layer of the serous pericardium

The muscle layer of the heart is called the:

• endocardium

• myocardium

• pericardium

• epicardium

What describes the Endocardium?

• It is the outermost layer of the heart.

• It is a thick layer of muscle.

• It is a thin layer lining the heart chambers.

• It is responsible for the electrical conduction in the heart.

What is the main function of the sinoatrial node in the heart?

• To initiate the heartbeat and regulate its pace

• To pump blood to the lungs

• To separate the left and right atria

• To supply blood to the heart muscle

Which blood vessel carries deoxygenated blood from the heart to the lungs?

• Aorta

• Pulmonary artery

• Pulmonary vein

• Vena cava

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

• To prevent backflow of blood into the atria

• To pump blood into the ventricles

• To separate the left and right ventricles

• To regulate the heart rate