Identify the surfaces of gaseous exchange in the following:-
(b) Explain how oxygen gets into the tissues of an insect
Describe the changes that occur to the rib cage and the diaphragm during inspiration
Give a reason for each of the following on mammalian Red blood cells
- Absence of the nucleus
- Biconcave shape
State two ways in which the surface area of the fish filaments is increased for efficient gaseous
25. Why should respiratory surfaces be:
State any two structures used for gaseous exchange in plants.
Name any two sites where gaseous exchange takes place in a leaf of a terrestrial plant
- Describe the mechanism of inhalation in man.
Describe the mechanism of opening and closing of the stomata using the the three theories
Com[plete the table below to show how various food tests are done
|Put test substance in the t. tube Add benedict soln.Boil||– Colour changes to yellow/orange/red|
|Vit. C Ascorbic acid||– Vit. C present.|
|Protein||– No colour change||– Protein absent.|