Emphysema is a disease of the lungs. Explain why people suffering from this condition may feel weak and short of breath.(6 marks)

Emphysema is an obstructive lung disease(1), where alveoli collapse due to break down of elastin in their walls(2). This means that the lungs cannot recoil(3), making expiration difficult. There is less surface area and increased diffusion distance(4), thus reducing the diffusion gradient so less air leaves the lungs and less oxygen enters the blood(5). Therefore, a  person suffering from emphysema may feel weak and short of breath as they're taking in less oxygen into their tissues so less ATP/energy is produced(6).

SI
Answered by Sara I. Biology tutor

5241 Views

See similar Biology A Level tutors

Related Biology A Level answers

All answers ▸

Explain the process of transcription in living cells


Part of the retina of a young rat was removed and kept in the dark for two hours. This allowed the pigment in the rod cells to recover from bleaching caused by exposure to light. Suggest what happens in the rod cells during this two hours of darkness.


What hormones are involved in a pregnancy test and how does it work ? (6 marks)


Cellular structure of the brain


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