Understanding the Cardiac Cycle and Blood

What is the primary function of red blood cells in the human body?

• To fight infections

• To transport oxygen

• To clot blood

• To regulate body temperature

Which component of blood is responsible for clotting?

• Red blood cells

• White blood cells

• Platelets

• Plasma

What is the main function of white blood cells?

• To carry nutrients

• To fight infections

• To transport carbon dioxide

• To maintain blood pressure

Which type of blood vessel carries blood away from the heart?

• Veins

• Arteries

• Capillaries

• Venules

What is the smallest type of blood vessel in the circulatory system?

• Arteries

• Veins

• Capillaries

• Arterioles

Which blood vessel has valves to prevent backflow of blood?

• Arteries

• Veins

• Capillaries

• Arterioles

What is the correct order of blood flow through the heart starting from the right atrium?

• Right atrium, right ventricle, pulmonary artery, lungs, left atrium, left ventricle, aorta

• Right atrium, left atrium, right ventricle, left ventricle, aorta, lungs

• Right atrium, left ventricle, right ventricle, left atrium, aorta, lungs

• Right atrium, right ventricle, left atrium, left ventricle, aorta, lungs

What is the term for the pressure exerted by circulating blood upon the walls of blood vessels?

• Blood viscosity

• Blood pressure

• Blood volume

• Blood flow

Which hormone is primarily responsible for regulating blood pressure?

• Insulin

• Adrenaline

• Aldosterone

• Thyroxine

What is the average normal blood pressure reading for a healthy adult?

• 90/60 mmHg

• 120/80 mmHg

• 140/90 mmHg

• 160/100 mmHg