Put the events in order to demonstrate how the body maintains its oxygen levels.
A person begins to exercise
The person's breathing rate increases, expelling extra carbon dioxide and bringing in more
oxygen
==
Oxygen levels in the body decrease, while carbon dioxide levels increase
Sensors in different parts of the body sense the changes to oxygen and carbon dioxide
The control center determines a response and sends a signal to the respiratory and
cardiovascular system
Cellular respiration levels increase, causing oxygen in the cells to be depleted (used up)
=The oxygen level increases and CO2 level decreases back to the set point

Cells need to maintain oxidative metabolism for energy production, requiring a continuous supply of oxygen and release of carbon dioxide. As tissues consume oxygen and produce carbon dioxide during cellular respiration, the body actively adjusts breathing to maintain normal gas and pH levels through the respiratory and cardiovascular systems.

Carbon dioxide levels play a crucial role in regulating the body's ventilation. When levels rise, the brain detects this change and signals the respiratory system to adjust breathing rate to expel excess carbon dioxide and bring in more oxygen, ultimately maintaining homeostasis.

During exercise, when cellular respiration rates increase and oxygen levels in cells are depleted, the body responds by increasing breathing rate and depth to ensure sufficient oxygen supply and proper gas exchange.

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