CIE iGCSE Co-Ordinated Science B9.4 Blood Exam Style Questions Paper 3
Question
(a) The number of new infections of HIV each year in one country is recorded.
Fig. 4.1 is a bar chart of the results.
(i) Calculate the percentage increase in cases between 1998 and 2002 shown in Fig. 4.1.
number of new HIV infections in 1998 ……………………………………………………………………
number of new HIV infections in 2002 ……………………………………………………………………
percentage increase = ………………………………………………….. %
(ii) Suggest three reasons for the change in the number of new HIV infections between 2002 and 2008 in Fig. 4.1.
1 …………………………………………………………………………
2 …………………………………………………………………………
3 …………………………………………………………………………
(b) Fig. 4.2 is a photomicrograph of blood.
State the names and functions of the two types of cells, A and B, shown in Fig. 4.2.
cell type A
name …………………………………………………………………………
function …………………………………………………………………………
cell type B
name …………………………………………………………………………
function …………………………………………………………………………
(c) State the name of the organ responsible for pumping the blood around the body.
▶️Answer/Explanation
Ans : 4(a)(i) infections in 1998 – 4600 and infections in 2002 – 7000 ; ((7000 – 4600) / 4600) × 100 = 52 ;
4(a)(ii) any three from:
increased education / awareness ;
use of condoms ;
screening of blood transfusions ;
use of clean needles ;
increased screening ;
AVP ;
4(b) cell type A
red blood cell ;
transport of oxygen ;
cell type B
white blood cell ;
production of antibodies / phagocytosis ;
4(c) heart ;
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 ;
Question
(a) Complete the definition of the term hormone.
A hormone is a chemical substance, produced by a ………………………………………..and carried by
the blood. It alters the activity of one or more specific target …………………………………. .
(b) State the name of the component of blood that transports hormones.
……………………………………………………………………………………………………………………………
(c) A person experiences a scary event whilst wearing a heart rate monitor.
Fig. 4.1 shows her heart rate before, during and after the event.
(i) Use Fig. 4.1 to suggest the time that the scary event takes place.
time = …………………………………….. minutes
(ii) Use Fig. 4.1 to identify the maximum heart rate of this person.
heart rate = ………………………………………….. bpm
(iii) State the name of the hormone that causes the increase in heart rate seen in Fig. 4.1.
…………………………………………………………………………………………………………………….
(iv) State two other effects of this hormone.
1 ……………………………………………………………………………………………………………………….
2 ……………………………………………………………………………………………………………………….
(d) Complete these sentences about the human nervous system.
The nervous system consists of the central nervous system and the ……………………………………….. nervous system.
The central nervous system has two parts: the ………………………………………..
and the ……………………………………….. .
▶️Answer/Explanation
Ans: 4(a) gland ;
organs ;
4(b) plasma ;
4(c)(i) 4 (minutes) ;
4(c)(ii) 109 (bpm) ;
4(c)(iii) adrenaline ;
4(c)(iv) widened pupils ;
increased breathing rate ;
any valid point ;;
4(d) peripheral ;
brain ;
spinal cord ;
Question
(a) Fig. 4.1 is a photomicrograph of a cross-section of a human vein.
(i) Describe two ways the appearance of an artery is different from the vein shown in Fig. 4.1.
1 ……………………………………………………………………………………………………………………….
………………………………………………………………………………………………………………………….
2 ……………………………………………………………………………………………………………………….
………………………………………………………………………………………………………………………….
(ii) State the name of a structure present in veins that is not visible in Fig. 4.1.
…………………………………………………………………………………………………………………………
(b) State the name of two veins that transport blood to the heart.
1 ……………………………………………………………………………………………………………………….
2 ………………………………………………………………………………………………………………………
(c) Describe the function of capillaries.
…………………………………………………………………………………………………………………………
…………………………………………………………………………………………………………………………
(d) Table 4.1 shows the functions of the main components of blood.
Complete Table 4.1.
▶️Answer/Explanation
Ans: 4(a)(i) thicker wall ;
narrower lumen ;
4(a)(ii) valves ;
4(b) pulmonary (vein) ;
vena cava ;
4(c) transfer, oxygen/nutrients, to, tissues/cells ;
or
transfer carbon dioxide/urea/(named) waste product, away from tissues/cells ;
4(d) white blood cell ;
platelets ;
plasma ;
red blood cell ;
Question
(a) Table 7.1 shows some of the functions of the main components of blood.
Complete Table 7.1 with the name of the component of blood for each function.
| Name of Component | Function of Component |
|---|---|
| blood clotting | |
| oxygen transport | |
| phagocytosis and antibody production | |
| used for transport of hormones |
▶️Answer/Explanation
1. Platelets
2. Red blood cells
3. White blood cells
4. Plasma
(b) Some of the substances transported by the blood need to be excreted.
The boxes contain the beginnings and the endings of some sentences. Join one sentence beginning to one sentence ending to define the term excretion.
▶️Answer/Explanation
Excretion is the removal from organisms of toxic materials and substances in excess of requirements.
(c) Excretion, respiration and nutrition are three characteristics of living organisms.
Name two other characteristics of living organisms.
▶️Answer/Explanation
1. Movement
2. Growth