This document is a biology exam for grade 9 students covering topics like human anatomy and physiology. It consists of 7 pages with questions in two sections - multiple choice questions worth 10 marks (Section A), and longer answer questions worth 40 marks (Section B). The exam tests knowledge of the heart, blood vessels, muscles, joints, skin, lymphatic system, and risks of diet to cardiovascular health.

1. Mid exam / first term 2010 G.A. Atoll School, Kolamaafushi
Page 1 of 7
Biology/Grade 9
c
Student’s Name: ………………………………. Index: ……………. Class…………….
MID-EXAM
BIOLOGY
GRADE – 9
Total Marks: 50 Duration: 50 Minutes First Term- 2010
This document consists of 7 printed pages.
Section A (10 marks)
Answer all the questions by drawing a circle on the correct answer.
1. The diagram shows the arrangement of bones in the human arm
What are numbered bones?
2. The diagram shows a section through a human heart.
Which chamber of the heart pumps blood to the lungs?
3. Some of the components of the blood of a mammal are listed.
1 antibodies 3 platelets
2 fibrinogen 4 white cells
Which two of these components are involved in attacking bacteria and other organisms that
cause disease?
A. 1 and 2 B. 1 and 4 C. 2 and 3 D. 3 and 4
Humerus Radius Ulna
A 1 2 3
B 1 3 2
C 3 1 2
D 3 2 1

2. Mid exam / first term 2010 G.A. Atoll School, Kolamaafushi
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Biology/Grade 9
4. Which of the following is relatively hard, but softer than bones, less rigid and
slightly elastic (flexible) than bones.
A. Bone B. Cartilage C. Metal D. Stone
5. The table shows the characteristics of the blood in one blood vessel in the body.
Oxygen
concentration
carbon dioxide
concentration Pressure
high Low high
Which blood vessel contains blood with these characteristics?
A. Aorta B. Pulmonary vein C. Pulmonary artery D. Vena cava
6. The diagram shows a synovial joint. What structure is ‘Y’?
A. Cartilage B. Ligament C. Tendon D. Muscle
7. The graph shows pressure changes in the left side of the heart, during a single
heart beat. Between points W and X, are the following valves open or closed?

3. Mid exam / first term 2010 G.A. Atoll School, Kolamaafushi
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Biology/Grade 9
8. The diagram represents a tissue with an adjacent capillary.
Which substances can 1, 2 and 3 represent?
1 2 3
A Glucose Tissue Fluid Carbon dioxide
B Oxygen Carbon dioxide Glucose
C Tissue Fluid Glucose Oxygen
D Tissue Fluid Oxygen Carbon dioxide
9. The diagram shows the muscles of upper arm. What happens to muscle X and Y
to raise the bones of the lower arm?
10. Under which circumstances will lactic acid accumulate in muscles?

4. Mid exam / first term 2010 G.A. Atoll School, Kolamaafushi
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Biology/Grade 9
Section B (40 marks)
1. The diagram below represents the structure of the heart.
a) Use arrows to indicate the direction of blood flow through the heart. [1]
b) Name the parts labelled A to D.
A…………………………. B………………………….
C…………………………. D…………………………. [2]
c) What are the functions of D and E?
D……………………………………………………………………………………………….
E…………………………………………………………………………………………….. [1]
d) Why do ventricles have thicker muscular walls than atria?
…………………………………………………………………………………………………
……………………………………………………………………………………………….[1]
e) Describe what happens in one heart beat.
…………………………………………………………………………………………………
…………………………………………………………………………………………………
…………………………………………………………………………………………………
……………………………………………………………………………………………….[3]
f) How does cardiac muscle differ from muscles which move the body?
…………………………………………………………………………………………………
……………………………………………………………………………………………….[1]
g) Complete the table to show whether the blood in vessels F and G, is oxygenated or
deoxygenated and under high or low pressure. [2]
Type of blood Type of pressure
F
G
[Total 11 marks]
A
A A A
A
A A
A
A A
A
A B
B
B
C
A A A
A
A A
A
A A
A
D
B
A A A
A
A A
A
A A
A
A A A
A
A A
A
A A
A
B
A A A
A
A A
A
A A
A
E
A A A
A
A A
A
A A
A
F
A A A
A
A A
A
A A
A
G
A A A
A
A A
A
A A
A

5. Mid exam / first term 2010 G.A. Atoll School, Kolamaafushi
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Biology/Grade 9
2. The Fig. below shows the structure of forearm.
a) (i) Name the two types of joints present in the forearm.
................................................................................................................................................[1]
b) Describe how the muscles, tendons, joins and bones are involved in raising and lowering of
the forearm at the human elbow joint.
...……………………………………………………………………………………………….………
……………………………………………………………………………………………………………
……………………………………………………………………………………………………………
………………………………………………………………………………………………………. [4]
c) Name two substances, essential to a muscle for its repeated contraction, which are
delivered to it by the bloodstream.
...………………………………………………………………………………………………… [1]
d) Explain the structures and functions of synovial joint.
……………………………………………………………………………………………………………
……………………………………………………………………………………………………………
………………………………………………………………………………………………………. [2]
[Total: 8]
3. Fig. shows a section through a small surface wound to the skin.

6. Mid exam / first term 2010 G.A. Atoll School, Kolamaafushi
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Biology/Grade 9
a) Name structure O and the type of blood vessel P shown in figure.
D……………………………………………………………………………………………….
E…………………………………………………………………………………………….. [1]
b) State two features that are characteristic of the type of blood vessel P.
1…………………………………………………………………………………………………
2………………………………………………………………………………...………..… [2]
c) Name four types of blood cells that you can observe from the above diagram.
…………………………………………………………………………………………………
………………………………………………………………………………...………..….. [2]
d) Explain what is happening to the bacteria in the above figure.
i) At M
…………………………………………………………………………………………………
……………………………………………………………………………………………….[1]
ii) At N
…………………………………………………………………………………………………
……………………………………………………………………………………………….[1]
e) Explain how the wound is being sealed in the region under the scab.
…………………………………………………………………………………………………
…………………………………………………………………………………………………
…………………………………………………………………………………………………
……………………………………………………………………………………………….[4]
[Total 11 marks]
4. The diagram represents a group of body cells and some parts of the circulatory system. The
arrows show movement of fluids.
a) Name the fluids contained in space x, y and z.
x………………………….. y……………………………. Z……………………… [1]
b) Name one substance that the cells remove from the fluid in y and one substance that the
cells add up to the fluid in y.
Removed substance: ………………………………………
Added substance: …………………………………………. [1]
YZ
Y
X
Lymphatic
capillary

7. Mid exam / first term 2010 G.A. Atoll School, Kolamaafushi
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Biology/Grade 9
c) Describe how the fluid in z is returned to the circulation?
…………………………………………………………………………………………………
…………………………………………………………………………………………………
……………………………………………………………………………………………….[2]
d) Name a disease caused due to the blockage of vessels through which liquid z
passes.
……………………………………………………………………………………………….[1]
e) Name a causative agent for the name disease in (e).
……………………………………………………………………………………………….[1]
[Total 6 marks]
5. a) List any two structural and functional features of a vein and an artery.
………………………………………………………………………………………………………
………………………………………………………………………………………………………
………………………………………………………………………………………………………
……………………………………………………………………………..…………………….[2]
b) Explain how a diet high in animal fat may cause coronary heart disease.
………………………………………………………………………………………………………
………………………………………………………………………………………………………
………………………………………………………………………………………………………
……………………………………………………………………………..…………………….[2]
[Total 4 marks]