Question
(a) Fig. 2.1 shows the transfer of materials between blood and tissues.
(i) Complete Table 2.1 by:
• stating the names of the fluids
• writing yes if the fluid contains red blood cells or no if the fluid does not contain
red blood cells.
(ii) State the name of the process by which oxygen is transferred from fluid B to the cells.
(iii) Explain why cells need oxygen.
(b) Describe the functions of arterioles in the skin.
(c) Describe the functions of lymph nodes in the lymphatic system.
(d) Lacteals are part of the lymphatic system.
(i) State where in the body lacteals are found.
(ii) Describe the role of lacteals.
Answer/Explanation
Answer:
(a) (i)
(ii) diffusion ;
(iii) (aerobic) respiration ;
for the release of energy ;
for a (named) metabolic process ;
(b) 1 deliver / supplies, blood / oxygen / glucose (from arteries) to,capillaries / shunt vessels ;
2 controls blood flow, through capillaries / to the surface of the skin ;
3 by vasoconstriction / vasodilation ;
4 ref to (arteriole) muscle contraction / relaxation ;
5 ref to maintenance of body temperature / homeostasis
/ description of ;
(c) contains lymphocytes (which produce antibodies) ;
filters the lymph ;
ref. to immunity / defends against disease / ref. to destruction of
(named) pathogens ;
(d) (i) small intestine / villi ;
(ii) fat, absorption / transport ;
Question
Fig. 3.1 shows an external view of the heart.
(a) A blood clot is stuck at X. Explain what will happen to the heart muscle cells in the
shaded area on Fig. 3.1.
(b) List three actions people can take to reduce the risk of having a blood clot in the
coronary arteries.
Answer/Explanation
Ans:
Question
Fig. 3.1 shows a poster that a student made for a biology lesson.
The teacher told the class that the student had made a number of mistakes.
(a) For each of the three labels, correct the mistakes by giving the name and function of
each component.
(b) Name one other component of the blood that is not labelled on the poster.
State its function.
Answer/Explanation
Ans:
Question
Fig. 9.1 shows a sample of human blood.
(a) Table 9.1 states the functions of some parts of the blood.
Complete the table using the label letters from Fig. 9.1.
Use each letter only once.
Answer/Explanation
Ans:
(b) Name the blood vessel likely to carry the highest concentration of carbon dioxide.
……………………………………………………………………………………………………………………………..[1]
Answer/Explanation
Ans: capillary / hepatic vein / pulmonary artery / vena cava;
) Name the mineral likely to be removed from the blood by the bones and teeth.
……………………………………………………………………………………………………………………………..[1]
[Total: 5]
Answer/Explanation
Ans: calcium / phosphorus;