Question

Q1 List the similarities and differences between aerobic and anaerobic respiration.
Q2 Why do we often sneeze when we inhale a lot of dust- laden air?
Q3 Why does an athlete breathe faster and deeper than usual after finishing the race?

Answer 1

• The similarities between aerobic and anaerobic respiration, is that they both use glucose as the starting molecule. This is called the substrate. In addition, both aerobic and anaerobic respiration produce ATP, however, aerobic respiration produces a lot more ATP compared to anaerobic respiration.
• When we inhale air containing dust particles, the particles get trapped in the hair present in nostrils. Sometimes, these particles may pas s through the hair and enter the nasal cavity. They irritate the mucus lining of the nasal cavity, and as a result we sneeze.
• When the athlete runs in the race, his body needs more oxygen. His rate of breathing increases so that more oxygen can be supplied to the body. This is the reason, an athlete needs to breathe faster and deeper than usual; after finishing the race.

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