Cardiovascular System Quiz

What are the three layers of the heart wall?

• Myocardium, Endocardium, Fibrous skeleton

• Epicardium, Endocardium, Pericardium

• Pericardium, Myocardium, Endocardium

• Epicardium, Myocardium, Endocardium

Which chamber of the heart receives blood from the pulmonary veins?

• Left atrium

• Right ventricle

• Right atrium

• Left ventricle

What prevents backflow from the ventricles into the atria?

• Semilunar valves

• Atrioventricular valves

• Pulmonary valves

• Coronary valves

What is the primary function of the SA node?

• To receive blood from the body

• To pump blood

• To initiate action potentials

• To regulate blood pressure

What is the volume of blood ejected from the left or right ventricle each minute called?

• Stroke volume

• Cardiac output

• Blood pressure

• Heart rate

Which factor does NOT regulate heart rate?

• Age

• Gender

• Blood type

• Physical fitness

What is the primary source of ATP for the heart at rest?

• Lactic acid

• Fatty acids

• Glucose

• Amino acids

What is the term for the contraction phase of the cardiac cycle?

• Diastole

• Fibrillation

• Systole

• Relaxation

How many heart sounds are typically heard during a normal cardiac cycle?

• Four

• Two

• Five

• Three

What type of exercise is recommended to improve cardiovascular health?

• Anaerobic exercise

• High-intensity interval training

• Aerobic exercise

• Isometric exercise