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NDOLA HILL SCHOOL
DEPARTMENT OF NATURAL SCIENCES
NATURAL SCIENCE DEPARTMENT
GRADE 12
BIOLOGY PRACTICAL
EXAM
PAPER 3EEEE
GRADE
11 LEVEL BIOLOGY
5090/3
TEST ONE
Monday
FRIDAY
07
26th March, 2012
TH
JUNE 2019
TERM 2
1 hour 15 minutes
TIME: 1 HOUR 30 MINUTES
INSTRUCTIONS TO CANDIDATES
Write your Name and Class on the space provided below this page.
Write your answers on separate answer sheets.
Answer all questions in this paper.
NDOLA HILL SCHOOL
2019
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1. The lungs and the kidneys are excretory organs of the human body.
(a) (i) Define the term excretion.
(ii) State an excretory product that is passed out through the lungs.
(iii) Outline the role of the liver in excretion.
2. Figure 2.1 shows a cross-section of a kidney.
Fig. 2.1
(a) Name the structures labelled, E, F and G as shown in Fig. 2.1.
(b) Explain the function of the renal capsule in the kidney.
(c) Give one example, other than glucose, of a substance that is reabsorbed into
the blood from the renal tubule.
3. Figure 3.1 is a diagram of a nephron.
Fig. 1.2
NDOLA HILL SCHOOL
2019
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(a) Label the structures 1-6
(b) Describe the process of excretion in the kidney.
4. People with kidney disease are often treated in renal dialysis clinics. Their blood
passes through tubes lined with a special membrane for about three hours.
(a) State two waste substances that are removed from the blood by dialysis.
(b) Kidney patients may be given a kidney transplant. State one advantage and one
disadvantage of kidney transplants compared with dialysis.
NDOLA HILL SCHOOL
2019