Cardiac Cycle Quiz

What is the main focus of the video?

• The structure of the human heart

• The process of digestion

• The events taking place in the heart during the cardiac cycle

• The function of the lungs

What does the term 'systole' refer to?

• Heart rate

• Relaxation

• Contraction

• Blood flow

What does 'diastole' mean?

• Heart rate

• Blood flow

• Relaxation

• Contraction

At the end of the previous cardiac cycle, what state are the atria and ventricles in?

• Relaxed

• Partially relaxed

• Contracted

• Partially contracted

Through which vessels does blood flow into the atria?

• Aorta and pulmonary artery

• Vena cava and pulmonary vein

• Coronary arteries

• Capillaries

What causes the atrioventricular valves to open?

• Relaxation of the atria

• Ventricular pressure being greater than atrial pressure

• Atrial pressure being greater than ventricular pressure

• Contraction of the ventricles

What happens during atrial systole?

• The ventricles relax

• The ventricles contract

• The atria contract

• The atria relax

What occurs after the atria contract?

• The atria relax

• The atria contract again

• The ventricles relax

• The ventricles contract

What causes the atrioventricular valves to close?

• Relaxation of the ventricles

• Contraction of the atria

• Ventricular pressure being greater than atrial pressure

• Atrial pressure being greater than ventricular pressure

Which valves open to allow blood to be pumped out of the heart?

• Tricuspid valve

• Mitral valve

• Atrioventricular valves

• Semilunar valves