Question & Answer

Choose the by-products of respiration in humans.

Choose the by-products of respiration in humans. a) Carbon dioxide.
b) Oxygen.
c) Water vapour.

1 Answer

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Quizzma TeamJune 13, 2025

The by-products of respiration in humans are:

a) Carbon dioxide.

c) Water vapour.

Explanation: During cellular respiration, glucose is broken down, and one of the main by-products produced is carbon dioxide, which is expelled from the body when we exhale. Water vapour is also a by-product, released as a result of the metabolic processes. Oxygen is not a by-product; rather, it’s consumed during the process of respiration.