This fully-resourced looks at the phenomenon known as the Bohr effect and describes and explains how an increased carbon dioxide concentration effects the dissociation of adult oxyhaemoglobin. The PowerPoint and accompanying resources have been designed to cover point 8.1 (g) of the CIE International A-level Biology specification and continually ties in with the previous lesson on the role of haemoglobin in carrying oxygen.
The lesson begins with a terminology check to ensure that the students can use the terms affinity, oxyhaemoglobin and dissociation. In line with this, they are challenged to draw the oxyhaemoglobin dissociation curve and are reminded that this shows how oxygen associates with haemoglobin but how it dissociates at low partial pressures. Moving forwards, a quick quiz is used to introduce Christian Bohr and the students are given some initial details of his described effect. This leads into a series of discussions where the outcome is the understanding that an increased concentration of carbon dioxide decreases the affinity of haemoglobin for oxygen. The students will learn that this reduction in affinity is a result of a decrease in the pH of the cell cytoplasm which alters the tertiary structure of the haemoglobin. Opportunities are taken at this point to challenge students on their prior knowledge of protein structures as well as the bonds in the tertiary structure. The lesson finishes with a series of questions where the understanding and application skills are tested as students have to explain the benefit of the Bohr effect for an exercising individual.
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Topics 7 & 8: Transport in plants & mammals (CIE A-level Biology)
This bundle contains 11 fully-resourced lessons which will engage and motivate the students whilst covering the following specification points in topics 7 and 8 of the CIE A-level Biology specification: TOPIC 7 * The structure of xylem vessel elements, phloem sieve tube elements and companion cells * The relationship between the structure and function of xylem vessel elements, phloem sieve tube elements and companion cells * Explain how hydrogen bonding of water molecules is involved with the movement in the xylem by cohesion-tension in transpiration pull and adhesion to cell walls * The pathways and mechanisms by which water and mineral ions are transported from the soil to the xylem and from roots to leaves * Assimilates move between sources and sinks between phloem sieve tubes * The mechanism by which sucrose is loaded into the phloem * The mass flow of phloem sap down a hydrostatic pressure gradient TOPIC 8 * The double, closed circulatory system of a mammal * The relationship between the structure and function of arteries, veins and capillaries * The role of haemoglobin in carrying oxygen and carbon dioxide * The significance of the oxygen dissociation curve of adult haemoglobin at different carbon dioxide concentrations * The external and internal structure of the heart * The cardiac cycle * The role of the SAN, AVN and Purkyne tissue in the initiation and conduction of the heart action The lesson PowerPoints and accompanying resources contain a wide range of tasks which include exam-style questions with mark schemes, discussion points and quiz competitions that will check on current understanding as well as making links to previously covered topics.
£15.00
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Topic 8: Transport in mammals (CIE International A-level Biology)
Each of the 7 lessons in this bundle are fully-resourced and have been designed to cover the content as detailed in topic 8 (Transport in mammals) of the CIE International A-Level Biology specification. The specification points that are covered within these lessons include: * The double, closed circulatory system of a mammal * The relationship between the structure and function of arteries, veins and capillaries * The role of haemoglobin in carrying oxygen and carbon dioxide * The significance of the oxygen dissociation curve at different carbon dioxide concentrations (Bohr effect) * The external and internal structure of the mammalian heart * The cardiac cycle, including the blood pressure changes during systole and diastole * The initiation and control of heart action The lessons have been written to include a wide range of activities and numerous understanding and prior knowledge checks so students can assess their progress against the current topic as well as be challenged to make links to other topics within this topic and earlier topics If you would like to see the quality of the lessons, download the arteries, veins and capillaries lesson as this is free
£9.00
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Very informative
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