Question

4/25
during respiration, ____ is consumed and ____ is released.
oxygen, carbon dioxide
nitrogen, carbon dioxide
carbon dioxide, oxygen
oxygen, nitrogen

Explanation:

In the process of respiration (both cellular and respiratory system - related), organisms take in oxygen ($O_2$) which is used in metabolic processes to break down nutrients. As a by - product, carbon dioxide ($CO_2$) is released. Nitrogen is not a primary gas involved in the basic respiration process (the exchange of gases for energy production), and the reverse of oxygen and carbon dioxide (option C) is what happens in photosynthesis, not respiration. Option D has nitrogen which is incorrect for respiration's gas exchange. So the correct pair is oxygen being consumed and carbon dioxide being released.

Answer:

A. oxygen, carbon dioxide