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Pbiol 021: Basic Biology Ii Question Paper

Pbiol 021: Basic Biology Ii

Course:Pre-University Biology

Institution: Kabarak University question papers

Exam Year:2010

INSTRUCTIONS:
Answer ALL Questions in Section A and Any ONE question from Section B.

SECTION A (50 MARKS)

1. Trace the path of blood in the heart. (10mks)
2. Compare the structure and functions of arteries and veins (6mks)
3. Giving appropriate examples in each case differentiate between;
a) Mutualism and Saprophytism (4mks)
b) Open and closed circulation (4mks)

4. How are the following adapted to their functions
a) red blood cells (4mks)
b) white blood cells (2mks)
5. Describe the mechanism of inspiration. (6mks)
6. List the properties of an effective respiratory surface. (4mks)
7. How does gaseous exchange in the alveolar takes place? (4mks)
8. Describe how gametogenesis takes place in the testis. (6mks)

SECTION B (20 MARKS)
9. (a) Define homeostasis (2mks)
(b) Discuss how the following are regulated in the human body
i) sugar level
ii) water
iii) temperature (10mks)
10. (a) Describe how human male reproductive system is adapted to its function. (10mks)
(b) Briefly discuss hormonal control of;
i) Oogenesis (5mks)
ii) Spermtogenesis (5mks)

11. With the aid of a well labeled diagram, describe the;
(a) nitrogen cycle (10mks)
(b) carbon cycle (10mks)

Pbiol 021: Basic Biology Ii Question Paper

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