1 The structure of cell membranes Describe the structure of the 3.2.3 Transport across cell MS 0.1 Recognise and make 6.1 cell membrane membranes use of appropriate units in Students can draw diagram of the calculations cell membrane and correctly The basic structure of all cell identify its components. They can membranes, including cell-surface MS 0.2 Recognise and use interpret electron micrographs of membranes and the membranes expressions in decimal and the cell membrane and calculate around the cell organelles of standard form the thickness of the membrane. eukaryotes, is the same. MS 0.4 Estimate results Ensure Students recognise that the same arrangement makes up the MS 1.8 Make order of cell surface membrane and the magnitude calculations membrane which bind the organelles in Eukaryotes. Explain the role of 2 The function of cell membranes 3.2.3 Transport across cell 6.1 molecules within the cell membranes Students can create models of the membrane cell membrane. They can know the The arrangement and any membrane as the mosaic movement of phospholipids, model’ and explain why it has this proteins, glycoproteins and glycolipids in the fluid-mosaic name. They can annotate their model of membrane structure. diagrams from previous lesson to Cholesterol may also be present in describe the function of each part cell membranes where it restricts of the membrane. the movement of other molecules making up the membrane. Describe how cell 3 The function of cell membranes 3.2.3 Transport across cell 6.2 membranes are adapted to membranes Students can list the features that their function make the cell membrane adapted Explain how specialised Cells may be adapted for rapid cells are adapted to to its function. They can recall how transport across their internal or increase the rate of some specialised cells are adapted external membranes by an transport increase in surface area of, or by to increase the rate of transport. an increase in the number of Give students pictures of protein channels and carrier specialised cells and in pairs they molecules in, their membranes. should come up with some of the features. Students should be able to:
1 The structure of cell membranes Students can draw diagram of the cell membrane and correctly identify its components. They can interpret electron micrographs of the cell membrane and calculate the thickness of the membrane. Ensure Students recognise that the same arrangement makes up the cell surface membrane and the membrane which bind the organelles in Eukaryotes. Describe the structure of the cell membrane 3.2.3 Transport across cell membranes The basic structure of all cell membranes, including cell-surface membranes and the membranes around the cell organelles of eukaryotes, is the same. MS 0.1 Recognise and make use of appropriate units in calculations MS 0.2 Recognise and use expressions in decimal and standard form MS 0.4 Estimate results MS 1.8 Make order of magnitude calculations 6.1 2 The function of cell membranes Students can create models of the cell membrane. They can know the membrane as the mosaic model’ and explain why it has this name. They can annotate their diagrams from previous lesson to describe the function of each part of the membrane. Explain the role of molecules within the cell membrane 3.2.3 Transport across cell membranes The arrangement and any movement of phospholipids, proteins, glycoproteins and glycolipids in the fluid-mosaic model of membrane structure. Cholesterol may also be present in cell membranes where it restricts the movement of other molecules making up the membrane. 6.1 3 The function of cell membranes Students can list the features that make the cell membrane adapted to its function. They can recall how some specialised cells are adapted to increase the rate of transport. Give students pictures of specialised cells and in pairs they should come up with some of the features. Describe how cell membranes are adapted to their function Explain how specialised cells are adapted to increase the rate of transport 3.2.3 Transport across cell membranes Cells may be adapted for rapid transport across their internal or external membranes by an increase in surface area of, or by an increase in the number of protein channels and carrier molecules in, their membranes. Students should be able to: 6.2