CXC Integrated Science exam guide: Section A: Coordination

CXC Integrated Science exam guide: Coordination

CXC Integrated Science Exam Guide

Section A-The Organism

General objectives of the section:

Candidates should demonstrate an understanding of:


The interdependence of life processes;


The relationship between an organism and its environment;  

The relationship between structure and function of an organism;

Unit VI: Coordination

Specific Objectives

Students should be able to:

Explanatory notes
Suggested Practical Activities

1. Describe the structure and functions of the nervous system;

Units of nervous system. Functions of nervous system, neurons, function; features necessary (receptors, control, effects).

*An understanding that nerves carry messages using chemical and electrical energy; identification of the effects of the malfunctioning of the system.

Simple reflex action; chemical and electrical transmission.

2. Describe the functions of the endocrine system

Endocrine-hormones as messengers, thyroid, pancreas, sex organs, adrenal glands and pituitary glands.

Use a flow chart to illustration the concept of the feedback mechanism; illustrate using temperature control and osmoregulation

3. Explain how life processes are regulated by feedback control

Ectothermic and endothermic animal; advantages of endothermic; feedback control-set range of values, detection of deviation and response, diagram.

4.  Describe the function of the parts of the mammalian eye

Eye- accommodation and control of amount light entering eye; long-and short-sight and correction.

Examine a model eye and a camera.

5. Compare the action of the eye and the simple box-camera

Use model of box camera.

6. Discuss the conditions which may adversely affect sight

Explanation of how defects may be corrected by appropriate lenses; effects of bright light, ultra violet light and physical injury.

Go to Section B: The Home/Worklace


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