CIE iGCSE Co-Ordinated Science B9.1 Circulatory systems Exam Style Questions Paper 3
Question
(a) A student records their pulse rate in beats per minute (bpm) during different types of activity.
Fig. 4.1 shows a bar chart of the results.
(i) Identify the activity that results in the smallest increase in pulse rate from the resting pulse rate.
…………………………………………………………………………………………………………………….
(ii) Calculate the percentage increase in pulse rate from resting to running shown in Fig. 4.1.
pulse rate during rest ……………………………………….. bpm
pulse rate during running ……………………………………….. bpm
percentage increase = …………………………………………………
(b) The rate of aerobic respiration increases during exercise.
(i) State the two reactants in aerobic respiration.
1 ……………………………………………………………………………………………………………………….
2 ……………………………………………………………………………………………………………………….
(ii) Suggest why the rate of respiration increases during exercise.
………………………………………………………………………………………………………………………….
………………………………………………………………………………………………………………………….
………………………………………………………………………………………………………………………….
(c) A hormone that causes pupils in the eye to widen also affects breathing and pulse rate.
(i) State the name of this hormone.
…………………………………………………………………………………………………………………….
(ii) State the component of blood that transports hormones.
…………………………………………………………………………………………………………………….
▶️Answer/Explanation
Ans: 4(a)(i) yoga ;
4(a)(ii) pulse rate at rest – 68 and pulse rate during running – 140 ;
((140 − 68) / 68) × 100 = 106 ;
4(b)(i) glucose ;
oxygen ;
4(b)(ii) any two from:
more energy is required ;
for muscle contraction ;
(aerobic) respiration releases energy ;
4(c)(i) adrenaline ;
4(c)(ii) plasma ;
Question
(a) Fig. 1.1 is a diagram of the circulatory system in humans.
(i) State the name of the blood vessels labelled A and C in Fig. 1.1.
A …………………………………………………………………………
C …………………………………………………………………………
(ii) Identify blood vessels B, D, and E in Fig. 1.1 as either an artery or a vein.
B …………………………………………………………………………
D …………………………………………………………………………
E …………………………………………………………………………
(iii) State the name of the structures in the circulatory system that ensure one-way flow of blood.
(iv) State the name of the part that separates the left side of the heart from the right side.
(b) The boxes on the left show the names of three types of blood vessel.
The boxes on the right show the average thickness of the wall of each type of blood vessel.
Draw lines to link each blood vessel with the average thickness of their walls.
blood vessel average thickness of wall
(c) Describe the function of capillaries.
(d) State the names of two main components of blood.
1 …………………………………………………………………………
2 …………………………………………………………………………
▶️Answer/Explanation
Ans : 1(a)(i) A – aorta ;
C – renal artery ;
1(a)(ii) B – artery
D – vein
E – artery ;;
1(a)(iii) valves ;
1(a)(iv) septum ;
1(b) 
1(c) exchange of (named) material between blood and tissue (cells) / AW ;
1(d) any two from:
red blood cells ;
white blood cells ;
plasma ;
platelets ;