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Pbiol 021: Basic Biology Ii Question Paper

Pbiol 021: Basic Biology Ii

Course:Certificate Of Pre-University Biology

Institution: Kabarak University question papers

Exam Year:2010

INSTRUCTIONS:
1. Answer ALL Questions in Section A and Any ONE question from Section B.
2. Writer concisely to the point
3. Maximum marks to be scored 70 (seventy)

SECTION A: (50 MARKS)

1. Explain the meaning of the following terms; (10mks)
A. Negative feedback mechanism
B. Positive feedback mechanism
C. Diabetes mellitus
D. Excretion
E. Extracellular digestion

2. (a) Define homeostasis (2 mks)
(b) Describe the functions of the following hormones in maintenance of homeostasis.
(10mks)
A. Glucagon
B. Gastrin
C. Secretion
D. Cholecystokinin

3. (a) Differentiate between pulmonary and systematic circulations. (2mks)
(b) Outline the properties of respiratory surfaces. (8mks)

4. (a) List four accessory glands of the alimentary canal. (4mks)
(b) Describe the functions of the liver in relation to digestion and homeostasis.
(6mks)

SECTION B: (30 MARKS)
5. By use of a simple diagram, describe the role of the nephron of the human kidney in
osmoregulation. (15mks)
6. Compare and contrast internal transport in animals with no circulatory systems, those
with an open circulatory system and those with a closed circulatory system. (15mks)

7. Most enzymatic hydrolysis of the macromolecules occurs in small intestine. Describe
in details the digestion of carbohydrates, proteins and lipids in the stomach and
duodenum. (15mks)

Pbiol 021: Basic Biology Ii Question Paper

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