Explain the Bohr Effect?

CO2 from respiring tissues diffuses into erythrocytes (red blood cells) where it reacts with water to form carbonic acid (process catalysed by the enzyme carbonic anhydrase). The carbonic acid dissociates into protons and hydrogen-carbonate ions. The increase in protons encourages the oxyhemoglobin to unload its oxygen and increase its uptake of protons, forming haemoglobinic acid and keeping the cells acidity from getting too high. The hydrogen-carbonate ions diffuse out of the erythrocytes into the blood plasma, causing the chloride shift as chloride ions diffuse into the erythrocytes to keep the pH of the cell stable. These changes explain why more oxygen is released from the blood at higher levels of carbon dioxide.

Answered by Theresa E. Biology tutor

7803 Views

See similar Biology A Level tutors

Related Biology A Level answers

All answers ▸

What are xylem and phloem in plants, and what do they do?


What happens during the light-dependent reaction?


What does heat do to an enzyme and why can enzymes not be 'killed'?


How come the antibodies in our blood and lymphatic system do not attack our own, but only specific antigens?


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