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Task No. and Title ASSESSMENT FORM Describe how materials are exchanged across cell membranes Written Description Guidance Notes: As a guideline this assignment should be at least 800 words in length. Describe the following processes: • Diffusion • Osmosis • Active Transport • Phagocytosis Explain how these exchanges are related to the cell membrane structure Explain the movement of water from cells using the concept of water potential You should use diagrams were possible. Assessment To achieve a Pass grade the submission must meet all the Assessment Criteria below. If all the Assessment Criteria are met, your submission will be assessed for higher grades against the identified Grade Descriptor components. If all the Assessment Criteria are not met then you will be offered a Resubmission within a short deadline set by your tutor. If your second submission, within the designated short period meets the Assessment Criteria it becomes eligible for assessment for the higher grades. Assessment Criteria 4.1 Describe the movement of substances across the cell membrane by diffusion, osmosis, active transport and phagocytosis. 4.2 Explain how the exchange of materials across the cell membrane is related to its structure. 4.3 Use the concept of water potential to explain the movement of water between cells and their environment. GD No. Merit Grade descriptor component Distinction Grade descriptor component 2 The student’s work makes use of relevant concepts and good levels of accuracy. The student’s work makes use of relevant concepts and excellent levels of accuracy. 3 The student generally selects appropriate methods with very good levels of efficiency. The student consistently selects appropriate methods with excellent levels of efficiency. 7 The student’s work taken as a whole, demonstrates a very good response to the demands of the assignment. The student’s work taken as a whole, demonstrates an excellent response to the demands of the assignment. This task



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