CXC CSEC exam guide: Human and Social Biology - Section B: Life Processes: Unit 2: The Respiratory System

CXC Human and Social Biology exam guide: Life processes Unit 2

CXC CSEC exam guide: Human and Social Biology



UNIT 2: The Respiratory System  

Specific Objectives

Students should be able to:


Explanatory notes


explain the importance of breathing in humans


reducing and non-reducing sugars,
mention chemical and physical properties of carbohydrates,
lipids and proteins.


relate the structures of the respiratory tract to their functions;


Diagram of respiratory system.



describe the breathing mechanisms; * 

Emphasis on principles involved. Demonstrate using a model.



outline the factors affecting rate of breathing;

Exercise, smoking, anxiety, drugs, environmental factors, altitude, weight. (Link to Specific Objective D5)


5. explain the concept of vital capacity;         

Graphical representation required.

6. distinguish between gaseous exchange and breathing;  Inclusion of gaseous exchange in the alveoli; diagram of alveolus required.

identify characteristics common to gaseous exchange surfaces;

8. differentiate between aerobic and anaerobic respiration; 

definition of aerobic and anaerobic respiration respirations;

the products of respiration;

description of industrial and domestic applications of anaerobic respiration;

oxygen debt;

worded equations to represent the processes of aerobic and anaerobic respiration.

9. explain the role of adenosine diphosphate (ADP) and adenosine triphosphate (ATP) in the transfer of energy; 

Adenosine triphosphate as the energy currency of the cell.

10. explain the technique of mouth-to-mouth resuscitation;

Definition of malnutrition (over and under nutrition),
anorexia and bulimia,
protein and energy malnutrition (kwashiorkor, marasmus).

11. explain the effects of cigarettes smoking; 

Effects of smoking as it relates to nicotine addiction,

damage to the lungs, carcinogenic properties and reduction in oxygen-carrying capacity of the blood.

Interpretation of data.



use tables, graphs and charts to represent data on the respiratory system.


Average: 4.8 (6 votes)
Your rating: None
chloe's picture
chloe (not verified)
writing cxc and need this

writing cxc and need this help

chloe's picture
Andrew (not verified)

Can any one assist me with accounts, our tell me about even classes

Post new comment

The content of this field is kept private and will not be shown publicly.
  • Web page addresses and e-mail addresses turn into links automatically.
  • Allowed HTML tags: <a> <em> <strong> <cite> <code> <ul> <ol> <li> <dl> <dt> <dd>
  • Lines and paragraphs break automatically.

More information about formatting options

This question is for testing whether you are a human visitor and to prevent automated spam submissions.
Enter the characters shown in the image.