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
Answered by Samuel J. Biology tutor

8991 Views

See similar Biology A Level tutors

Related Biology A Level answers

All answers ▸

What is meant by the term 'resolution' in terms of microscopy?


Define the term 'water potential' and describe the difference between isotonic, hypotonic and hypertonic solutions. Suggest the different effects on cells placed in the different solutions.


Detail the pathway of oxygenated water in the ventilation of a fish. Name and briefly describe the mechanism by which gaseous exchange takes place.


A fault opens in a forest and separates a population of lizards in half. In 100 years the fault closes and the lizards can interact again. Explain why the lizards are no longer able to breed.


We're here to help

contact us iconContact ustelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences