Page 33 - Biology for Advanced Secondary Schools Teachers Guide Form Five

Biology for Advanced Level Secondary Schools

Chapter
Six

Gas exchange and
FOR ONLINE READING ONLY
respiration

Introduction
Gas exchange and respiration are vital processes that provide energy

for all metabolic activities in living organisms. In this chapter, students
will learn about the physiology of gas exchange and respiration in
mammals which includes mechanism of transportation of gases,
aerobic and anaerobic respiration. They will also learn gas exchange
in plants which include mechanisms and theories of stomata opening
and closing. They will also carry out anatomical and physiological
investigations related to gas exchange system in living organisms.
The competences developed will enable students to avoid factors
that can affect their respiratory system. They will use anaerobic
processes to make food products, such as breads and yogurt.

Student activities
(a) Describing the physiology of gas exchange and respiration in
mammals (mechanism of transportation of gases, aerobic and
anaerobic respiration).
(b) Explaining gas exchange in plants.
(c) Investigating gas exchange system in living organisms.

Teaching and learning resources
Mouse or rat, dissection kit, dissecting tray, chloroform, and cotton
wool, a potted Tradescantia plant, water, forceps, needle, surgical or
razor blade, watch glasses, light microscope, slide, slide cover, blotting
paper, safranin, glycerine, ICT facilities and online resources

Form Five Teachers Guide
27