A.1.3.1 Cardiovascular system

What is the primary function of blood?

• To transport oxygen only

• To produce hormones

• To regulate body temperature

• To transport gases, nutrients, and waste products

What percentage of blood is made up of plasma?

• 55%

• 30%

• 40%

• 70%

What is the role of platelets in the blood?

• Transport oxygen

• Assist in clotting and repair

• Fight infections

• Carry nutrients

What is the term for the percentage of red blood cells in the blood?

• Hemoglobin

• Haematocrit

• Erythropoietin

• Cardiac output

What is the function of arteries?

• To facilitate gaseous exchange

• To store blood

• To carry oxygenated blood away from the heart

• To carry deoxygenated blood to the heart

What is the structure of capillaries?

• Elastic walls

• Wide lumen

• Thick muscular walls

• One cell thick

What does high blood pressure (hypertension) refer to?

• Below 90/60 mmHg

• Consistently 130/80 mmHg or higher

• Above 120/80 mmHg

• Normal blood pressure

What is the primary role of the pulmonary circulation?

• Deliver oxygenated blood to the body

• Return blood to the heart

• Deliver deoxygenated blood to the lungs

• Transport nutrients from the intestines

What is cardiac output?

• The volume of blood pumped by each ventricle

• The pressure of blood in the arteries

• The number of heartbeats per minute

• The amount of blood pumped out by the heart in one minute

What happens to blood pressure during dynamic exercise?

• It decreases

• It fluctuates randomly

• It remains the same

• It increases