18. Is simple diffusion active or passive transport? Explain your answer 19. Exp
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18. Is simple diffusion active or passive transport? Explain your answer 19. Explain the relationship between active transport and ATP 20. Vitamin E is a lipid substance that crosses the plasma membrane by dissolving in it and moving from high concentration to low concentration. is this type of movement active or passive transport? 21. When we say that the Na-K"pump is specific, what does that mean? 22. If a cell has 10 molecules of a transport protein that moves 2 molecules of glucose at a the maximum number of glucose molecules that the cell can move at a given time?Explanation / Answer
1.Simple diffusion requires molecules to move through special doorways in the cell membrane.
2.Active transport is the process by which dissolved molecules move across a cell membrane from a lower to a higher concentration. In active transport, particles move against the concentration gradient - and therefore require an input of energy from the cell.to move molecules accross the membrane against their gradient.
3.it is a form of osmosis.osmosis is the process in which water molecules move from a region of higher water potential to a region of lower potential down a water potential gradient across a partially permeable membrane, so little energy is required to carry out this process, thus it is a form or passive transport.
3.
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