Multiple choice

During respiration, the digested food is broken down by the reaction with oxygen in the body cells to produce _______, water and heat energy.

  1. hydrogen

  2. carbon dioxide

  3. helium

  4. nitrogen

  5. argon

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

This is the correct option. During respiration, the digested food is broken down by the reaction with oxygen in the body cells to produce carbon dioxide, water and heat energy.