The following figure shows the movement of solutes across a plasma membrane in the direction indicated by the arrows. This movement across the membrane: Extracellular environment Cytoplasm is an example of osmosis. is an example of simple diffusion. occurs by facilitated diffusion. requires a direct input of cellular energy.
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Step 1: The movement of solutes across the plasma membrane in the direction of the arrows is facilitated diffusion, as indicated by the presence of channel proteins aiding in the movement of solutes. Show more…
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'Facilitated diffusion is a type of passive transport that allows solutes to move across the plasma membrane of a cell. Which statements describe facilitated diffusion? Solutes move across the membrane down their concentration gradient through specialized membrane proteins. Small, uncharged molecules move down their concentration gradient out of a cell directly through the plasma membrane. Membrane proteins use energy to move solutes across the membrane against their concentration gradient. Small, charged molecules and ions move down their concentration gradient out of a cell through proteins in the plasma membrane. Solutes move down their concentration gradient directly through the plasma membrane without the use of energy:'
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Osmosis is the diffusion of water across a selectively permeable membrane. This process does not require the cell to use energy to move molecules. It is an example of passive transport.
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5. Water moves across membranes by a process called passive transport or specially is facilitated diffusion. Assuming only water can cross the membrane in the diagram below, draw what would happen to the beaker over time. Salt molecules Water 6. Match the terms with their descriptions: a. Hypotonic: iii b. Isotonic: i c. Hypertonic: ii
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