AQA A Level Biology复习笔记3.5.2 The Human Heart
Mammalian Heart Structure Heart structure The human heart has a mass of around 300g and is roughly the size of a closed fist The heart is a hollow, muscular organ located in the chest cavity...
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AQA A Level Biology复习笔记3.4.7 Animal Adaptations For Their Environment
Animal Adaptations For Their Environment Different types of haemoglobin Haemoglobin is a quaternary protein made up of four globin polypeptides and four haem groups The structure of haem is ...
AQA A Level Biology复习笔记3.4.6 Cardiac Output
Maths Skill: Using the Cardiac Output Equation Cardiac output (CO) is the term used to describe the volume of blood that is pumped by the heart (the left and right ventricle) per unit of tim...
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AQA A Level Biology复习笔记3.4.5 The Bohr Shift
The Bohr Shift Changes in the oxygen dissociation curve as a result of carbon dioxide levels are known as the Bohr effect, or Bohr shift When the partial pressure of carbon dioxide in the bl...
AQA A Level Biology复习笔记3.4.4 The Oxygen Dissociation Curve
The Oxygen Dissociation Curve The oxygen dissociation curve shows the rate at which oxygen associates, and also dissociates, with haemoglobin at different partial pressures of oxygen (pO2) P...
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AQA A Level Biology复习笔记3.4.3 The Role of Haemoglobin
The Role of Haemoglobin Transport of oxygen The majority of oxygen transported around the body is bound to the protein haemoglobin in red blood cells Red blood cells are also known as erythrocytes ...
AQA A Level Biology复习笔记3.4.2 Haemoglobin & Oxygen
The Haemoglobin Group The haemoglobins are a group of chemically similar molecules that are found in many different organisms For example chimpanzee, rats and humans are just some of the org...
AQA A Level Biology复习笔记3.3.5 Visking Tubing Practical
Practical Skill: Visking Tubing Investigating the absorption of the products of digestion using Visking tubing Visking tubing (sometimes referred to as dialysis tubing) is a non-living parti...
AQA A Level Biology复习笔记3.3.4 Mechanisms of Absorption
Mechanisms of Absorption Digestion breaks down food into smaller, soluble molecules The products of digestion are absorbed through the intestinal lining The absorption of amino acids and mon...
