CXC CSEC exam guide: Human and Social Biology - Section B: Life Processes: Unit 5: Excretion and Homeostasis



CXC Human and Social Biology exam guide: Life processes Unit 1


CXC CSEC exam guide: Human and Social Biology

SECTION B- LIFE PROCESSES

 

UNIT 5: Excretion and Homeostasis  

Specific Objectives

Students should be able to:

 

Explanatory notes

1

Explain the importance of excretion in human beings;

Include definition of excretion.

(Lnk to Specific Objective B1.27)

2

explain the roles of the organs involved in excretion;

 

Lungs, skin and kidney;

examples of metabolic waste

 

3

relate the structures of the kidney to their functions; 

internal structure of the kidney (diagram required),

structure and function of the nephron (diagram required);

selective reabsorption of substances;

composition of urine,

mention renal dialysis.

 

4

 

relate the structures of the skin to their functions; 

diagram required.

 

5. explain the concept of homeostasis;

Definition of homeostasis; examples of homeostasis.

6. explain the concept of feedback mechanisms;

Include regulation of carbon dioxide(CO2)

 

7.

describe the regulation of blood sugar;

Role of insulin and glucagon.

(Link to Specific Objective D6)

 

8. explain the regulation of water;

 

9. distinguish between heat and temperature;

 

10. describe the regulation of temperature.

 


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