This question was fairly attempted by candidates. Candidates could name the groups of bones that make up the vertebral column and name the end product of protein digestion in question 9(b) and (c)
In question 9(a), majority of the candidates were unable to tabulate the differences between the processes of breathing in.and breathing out.
Breathing in Breathing out
Diaphragm muscle Diaphragm relaxes
Contracts or flattens and become dome shaped
Intercostals muscles contract Intercostal muscles relax
Rib cage pulled upwards Ribs move downward
The lung expand and draw air the lungs shrink back to
in the nose/O2 normal/relaxed size forcing air our/CO2
