How does cellular respiration explain why animals breathe rapidly when they are running?
energy is used up while running, and cellular respiration needs oxygen to produce more energy.

energy is used up while running, and cellular respiration needs carbon dioxide to produce more energy.

glucose is used up while running, and cellular respiration needs oxygen to make glucose.

glucose is used up while running, and cellular respiration needs carbon dioxide to make glucose.

Answer is: Energy is used up while running, and cellular respiration needs oxygen to produce more energy.

Cellular respiration creates an energy molecule when glucose is broken down.

Balanced chemical reaction for cellular respiration (convert biochemical energy):  

C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O + energy, or:

glucose + oxygen → carbon dioxide + water + energy .

Carbon dioxide and water are released during cellular respiration.

This reaction is exothermic (energy is released).

the electronic configuration of an atom with eight electrons is 1s²2s²2p⁴. the orbital diagrams are shown in the figure.

as per the hunds rule:

1. electrons tend to avoid being in the same orbital as per as practicable.

2. electrons in different orbitals of the same energy will have their spin parallel.

this can be illustrated from the multiplicity of the orbitals of the atom. as there are four electrons in the p orbital and p orbital has 3 sub-shells. the electrons can be fed in different ways as shown in the figure but the correct orbital diagram will be as per the hunds rule.

the role of the microscope world in creating new materials .