Describe the pressure and volume changes in the lungs during inspiration

During inspiration, the intercostal muscles contract, moving the sternum up and out. This increases the thoracic volume, hence decreasing the pressure. The pressure gradient set up causes air inflow from outside. The diaphragm also flattens to increase the thoracic volume further.

Answered by Dhaval N. Biology tutor

3524 Views

See similar Biology A Level tutors

Related Biology A Level answers

All answers ▸

Messenger RNA (mRNA) is used during translation to form polypeptides. Describe how mRNA is produced in the nucleus of a cell.


Cellular structure of the brain


Explain the process of synaptic transmission.


Maltase is an enzyme found in the body that breaks down maltose. Explain why maltase can only catalyse this reaction?


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences