Is normal expiration, at rest, a passive or active process in a healthy individual? And why?
Expiration is a passive process. It happens due to relaxation, not contraction, of the muscles of the chest. As well as the elastic recoil of the lungs. Both of these processes do not require energy and hence are passive.
SJ
Related Biology A Level answers
All answers ▸What is the difference between the Parasympathetic Nervous System and the Sympathetic Nervous System?
What's the difference between meiosis and mitosis?
Explain how smooth muscle in the arterioles can reduce blood flow.
Explain the process of inspiration and the various muscles involved.