The Circulatory System
Science JC HL
Sample Question and Answers
The Circulatory System
Sample Questions & Answers
Blood
- (a) The photograph shows a red blood cell and a white blood cell taken using an electron microscope. Give one function for each type blood cell. (6)
- The diagram shows cross sections of an artery and of a vein. Why do arteries have much thicker walls than veins?
Give one other structural difference between arteries and
veins. | (6) |
- Red blood cells carry oxygen around the body White blood cells protect against infection
- Blood is under pressure
Veins have valves to prevent back-flow
Sample Questions & Answers
- Blood is a liquid tissue. The diagram shows blood viewed through a microscope.
(i) Name any two components of blood shown in the diagram. (6)
(ii) Give the function of each of the components of blood you have named. (6)
- Red Blood cells and white blood cells
- Red blood cells carry oxygen around the body White blood cells protect against infection
(iii) The diagram shows the human heart.
Why has the left ventricle got a thicker wall than the right ventricle? | (3) |
(iii) Left side has to pump blood further; all round the body
Sample Questions & Answers
- The diagram shows a person’s pulse rate being taken. (i) What causes a person’s pulse? (3)
(ii) How is a person’s pulse rate measured using this method? (6)
(iii) An athlete’s resting pulse rate is 58. After 10 minutes strenuous exercise their pulse rate was 120. After resting for 5 minutes their pulse rate reduced to 63.
Clearly account for the rise and fall in pulse rate experienced by the athlete
(6)
- The heart beating
- Count the number of beats in 1 minute
- He needs more oxygen She needs less oxygen
Sample Questions & Answers
- (a) Label clearly the pulmonary artery with an A, and the pulmonary vein with a V in the diagram of the heart.
(a)
- The simplified diagram shows the flow of blood through the lungs, heart and the rest of the body.
(i) Name the blood vessels labelled A and B. (6)
Capillaries are small blood v...