A-Level Biology - Haemoglobin - Oxygen Dissociation Curve | Bohr Effect (2026/27 exams)

⭐️ Check out our website https://www.cognito.org/ ⭐️ *** WHAT'S COVERED *** 1. Structure and function of haemoglobin * The quaternary structure and role of iron ions * How oxygen loads (associates) and unloads (dissociates) 2. The oxygen dissociation curve * Understanding the relationship between partial pressure and oxygen saturation * How cooperative binding creates the S-shaped curve 3. Different types of haemoglobin * Why fetal haemoglobin has a higher oxygen affinity * Adaptations in animals living at high altitudes 4. The Bohr effect * How carbon dioxide concentration affects oxygen affinity 5. Transport of carbon dioxide in the blood * Dissolved CO2, carbaminohaemoglobin, and hydrogen carbonate ions * The role of carbonic anhydrase and the chloride shift *** EXAM BOARD SPECIFIC INFO *** AQA - You don't need to know all the detail about the transport of carbon dioxide or the chloride shift OCR - Everything is relevant to your course! CIE - Everything is relevant to your course! *** CHAPTERS *** 0:00 Introduction 0:30 Structure of haemoglobin 1:11 Oxygen loading and unloading 2:02 Oxygen dissociation curve 3:14 Cooperative binding 3:50 Fetal haemoglobin 4:33 Adaptations to altitude 5:24 The Bohr effect 6:49 Transport of carbon dioxide 8:38 Chloride shift *** PLAYLISTS *** https://youtube.com/playlist?list=PLidqqIGKox7VzYfPIVt8T09xOLNcolCe4&si=8JmDajxjtba6rdc3 https://youtube.com/playlist?list=PLidqqIGKox7UZ3mWhbHv2aA_1vnbsfRPq&si=q3hEKdA4v7kbfwMe https://youtube.com/playlist?list=PLidqqIGKox7UTimdJ3eFcnt6xL9GUt2a6 https://youtube.com/playlist?list=PLidqqIGKox7XPh1QacLRiKto_UlnRIEVh&si=orIUwL3o2jOoiYjT https://youtube.com/playlist?list=PLidqqIGKox7X5UFT-expKIuR-i-BN3Q1g&si=DcihOwUkd9oWbbdp https://youtube.com/playlist?list=PLidqqIGKox7WeOKVGHxcd69kKqtwrKl8W&si=Y8MsO-FK948jnxpS https://youtube.com/playlist?list=PLidqqIGKox7UVC-8WC9djoeBzwxPeXph7&si=-7i5Iq7yOeJrhtu6 https://youtube.com/playlist?list=PLidqqIGKox7VKJD2WxRhoKaI6JGLVean8&si=NH_Q1ujhVgACM2FU #Alevel #Biology #study #revision #school #exam #AQA #OCR #Edexcel