What are the melechanisms that cause his breathing rate to increase

I am not completely sure what the context of the question is, but here are some things that could make your breathing rate increase:

Anything including moving like running, jumping, exercise, etc.

An anxiety attack, panic attack, or any situation in which you intake more oxygen. Such as when you have high levels of stress or are in danger.

These things cause your heart rate to increase as well causing your body to pump blood to the muscles faster.

Have a nice day.

yes i have all the correct answers

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