CELL MEMBRANES First quizsearch I have ever made but good luck revising! 4.0 / 5 based on 1 rating ? BiologyCellular processes and structureASOCR Created by: Bethany CunninghamCreated on: 05-10-12 17:12 Outline the way in which small, non polar substances enter the cell? Simple diffusion through the phospholipid bilayer (partially permeable membrane). 1 of 17 Outline the way in which large substances enter the cell? Through bulk transport: carrier proteins, endocytosis and phagocytosis. 2 of 17 Outline the way in which polar substances enter the cell? Through a pore: channel protein, facillitated diffusion, carrier proteins. 3 of 17 What is glycoprotein used for? Receptor/binding hormones. 4 of 17 What is another word for low water potential? Hypertonic 5 of 17 What is another word for high water potential? Hypotonic 6 of 17 When does facilitated diffusion stop? When equilibrium is reached 7 of 17 Is endocytosis and exocytosis passive or active? Active 8 of 17 What does isotonic mean? Same water potential than the cell. 9 of 17 What process is needed when a large number of substances needs to be moved? Bulk transport 10 of 17 Does temperature affect permeability? Yes 11 of 17 What happens to he phospholipids when they get hotter? They vibrate and this leaves gaps making a more permeable membrane. 12 of 17 What does cholesterol do? Maintains fluidity. 13 of 17 What is the distance across a membrane? 7 nanometres 14 of 17 What is the plasma membrane? The boundaries of a cell 15 of 17 What is lysis? This is when a cell bursts due to water. 16 of 17 What is the main feature of a cell membrane? Controls what passes in and out 17 of 17
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