Question

When is your breathing likely to speed up?

Answer 1

Your breathing is likely to speed up when your cells need more energy. Why? Well, faster breathing is likely to occur when your cells need more energy because doing things that force your muscles to work harder cause sweat glands often (which originates from the endocrine system), and to recuperate energy, your breathing rate increases so that more energy is circulated into your body.

Your final answer: The answer is D.