AQA A Level Biology復(fù)習筆記3.5.4 The Cardiac Cycle
The Cardiac Cycle The contraction of the heart is called?systole, while the relaxation of the heart is called?diastole Atrial systole is the period when the atria are contracting and ventric...
AQA A Level Biology復(fù)習筆記3.5.3 The Walls of the Heart
The Walls of the Heart The muscular walls of the atria are thinner than those of the ventricles When the atria contract, the thin muscular walls do not generate much pressure, but enough to ...
AQA A Level Biology復(fù)習筆記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...
上海天華英澳美學(xué)校怎么樣？
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AQA A Level Biology復(fù)習筆記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復(fù)習筆記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...
2023牛劍申請要求最新政策！
在日益激烈的競爭之下，不僅申請者為夢校使出渾身解數(shù)，學(xué)校也為如何在眾多優(yōu)秀學(xué)子中篩選出最適合自己的錄取者而頭疼不已，作為英國大學(xué)領(lǐng)頭羊，牛劍首先交出了答卷——入學(xué)評估。 大家都知道，牛劍和部分英國名校...
AQA A Level Biology復(fù)習筆記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復(fù)習筆記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復(fù)習筆記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復(fù)習筆記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...
