This lesson describes how the hydrolysis of ATP provides energy for biological processes such as active transport and endocytosis and exocytosis. The PowerPoint and accompanying resources have been designed to cover points 4.2 (iv), (v) & (vi) of the Edexcel A-level Biology B specification
The start of the lesson focuses on the structure of this energy currency and challenges the students to use their knowledge of nucleotides and specifically RNA nucleotides to recognise the components of ATP. As a result, they will learn that this molecule consists of adenine, ribose and three phosphate groups. In order to release the stored energy, ATP must be broken down and students will be given time to discuss which reaction will be involved as well as the products of this reaction. Time is taken to describe how the hydrolysis of ATP can be coupled to energy-requiring reactions and this leads into a series of exam-style questions where students are challenged on their knowledge of simple and facilitated diffusion to recognise that ATP is needed for active transport. These questions also challenge them to compare active transport against the forms of passive transport and to use data from a bar chart to support this form of transport. In answering these questions they will discover that carrier proteins are specific to certain molecules and time is taken to look at the exact mechanism of these transmembrane proteins. A quick quiz round introduces endocytosis and the students will see how vesicles are involved along with the energy source of ATP to move large substances in or out of the cell. The lesson concludes with a link to a future topic as the students are shown how exocytosis is involved in a synapse and in the release of ADH from the pituitary gland during osmoregulation.
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Topic 4: Exchange and transport (Edexcel A-level Biology B)
The wide variety of tasks that are written into the 18 lesson PowerPoints and accompanying resources that are included in this lesson bundle will engage and motivate the students whilst covering the detailed content of topic 4 of the Edexcel A-level Biology B specification (Exchange and transport). The following specification points are covered by these lessons: * Understand how the surface area to volume ratio affects the transport of molecules in living organisms * Understand why organisms need a mass transport system and specialised gas exchange surfaces as they increase in size * The structure of the cell surface membrane * Passive transport is brought about by diffusion and facilitated diffusion * Passive transport is brought about by osmosis * Understand how the properties of molecules affects how they are transported * Large molecules are transported in and out of cells by endocytosis and exocytosis * The process of active transport * The phosphorylation and hydrolysis of ATP * Understand how insects, fish and mammals are adapted for gas exchange * The structure of the heart, arteries, veins and capillaries * The advantages of the double circulatory system * The sequence of events of the cardiac cycle * The myogenic stimulation of the heart * Interpreting ECG traces * The role of platelets and plasma proteins in the sequence of events leading to blood clotting * The structure of haemoglobin in relation to its role in the transport of respiratory gases * The Bohr effect * The dissociation curve of haemoglobin * The significance of the oxygen affinity of foetal haemoglobin * The similarities and differences between the structure and function of haemoglobin and myoglobin * The formation and reabsorption of tissue fluid * Know that tissue fluid that is not reabsorbed is returned to the blood via the lymph * The structure of the xylem and phloem in relation to their role in transport * The movement of water by the apoplastic and symplastic pathways * The cohesion-tension model Hours and hours has gone into the intricate planning of all of these lessons and the quality can be sampled by downloading the following lessons which have been uploaded for free: Surface area to volume ratio ATP, active transport, endocytosis and exocytosis Structure of the heart, arteries, veins and capillaries Double circulatory system Apoplastic and symplastic pathways
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Topic 4.2: Cell transport mechanisms (Edexcel A-level Biology B)
This bundle of 4 fully-resourced lessons have been planned to include a wide variety of tasks which will engage and motivate the students whilst covering the following points as detailed in topic 4.2 of the Edexcel A-level Biology B specification: * The structure of the cell surface membrane, with reference to the fluid mosaic model * Passive transport is brought about by diffusion and facilitated diffusion * Passive transport is brought about by osmosis * The relationship between the properties of molecules and the method by which they are transported * Large molecules can be transported in and out of cells by endocytosis and exocytosis * The process of active transport and the role of ATP * The phosphorylation of ADP and the hydrolysis of ATP If you would like to sample the quality of the lessons in this bundle, then download the ATP & active transport lesson as this has been shared for free
£6.50
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