Cardiovascular 1 - PM Y9

Which chamber of the heart receives oxygenated blood from the lungs?

• a) Right atrium

• b) Left atrium

• c) Right ventricle

• d) Left ventricle

Which chamber pumps oxygen-rich blood to the body?

• a) Right atrium

• b) Left atrium

• c) Right ventricle

• d) Left ventricle

Which chamber of the heart pumps deoxygenated blood to the lungs?

• a) Right atrium

• b) Left atrium

• c) Right ventricle

• d) Left ventricle

What is the main function of the right atrium?

• a) Receive oxygenated blood

• b) Receive deoxygenated blood

• c) Pump blood to the body

• d) Pump blood to the lungs

What prevents backflow of blood from the right ventricle to the right atrium?

• a) Mitral valve

• b) Aortic valve

• c) Tricuspid valve

• d) Pulmonary valve

What is the function of the sinoatrial (SA) node?

• a) Slow down electrical signals

• b) Pump blood into ventricles

• c) Act as the heart's pacemaker

• d) Transmit signals to the ventricles

Where is the atrioventricular (AV) node located?

• a) In the right atrium

• b) In the left atrium

• c) Between the atria and ventricles

• d) In the right ventricle

What is the role of the AV node?

• a) Generate the heartbeat

• b) Delay electrical signals

• c) Contract the ventricles

• d) Maintain heart rhythm

What structure carries electrical signals from the AV node to the ventricles?

• a) SA node

• b) Bundle of His

• c) Purkinje fibers

• d) Tricuspid valve

What happens if the SA node fails to function properly?

• a) The heart stops beating

• b) The AV node takes over as pacemaker

• c) Blood stops flowing

• d) The Purkinje fibers contract