Concept:Respiration in man is mainly a process of gaseous exchange in which oxygen is taken in and carbon dioxide is given out to support energy release in the body.
Explanation:The body needs oxygen to break down glucose and release energy for life activities.
During this process, carbon dioxide is produced and must be removed from the body.
Therefore, taking in oxygen (I) and releasing carbon dioxide (II) are the essential features of respiration.
Regulating body temperature (III) is not a primary function of respiration; it is mainly done by the skin and sweating.
The overall equation for aerobic respiration is:
C6H12O6+6O2→6CO2+6H2O+energyThis shows that oxygen is consumed and carbon dioxide is released during respiration.
Hence, only statements I and II are correct.
Answer:I and II only.