Question 1
Explain briefly the following terms as associated with respiration:
(a) vital capacity;
(b) tidal volume;
(c) residual volume . [9 marks]
Observation
Some candidates could not explain the terms. Some candidates gave vague answers generally related to breathing.
The expected answers are:
A. Vital capacity
is the maximum amount of air; a person can expel from the lungs; after a maximum/ normal inhalation/inspiration.
B. Tidal volume
can be described as the volume of air; that is inhaled/exhaled;within each respiratory
cycle.
C. Residual volume
this can be described as the volume of air; remaining in the lungs; after a normal
expiration.