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This experiment shows the effect of osmosis on plant tissue. The cylinders will decrease or increase in mass if they lose or gain water by osmosis.
Oct 31, 2023 · The semipermeable membrane limits the diffusion of solutes in the water. Not surprisingly, the aquaporin proteins that facilitate water movement play a large role in osmosis, most prominently in red blood cells and the membranes of kidney tubules.
Whereas diffusion transports material across membranes and within cells, osmosis transports only water across a membrane and the membrane limits the diffusion of solutes in the water. Osmosis is a special case of diffusion.
Osmosis is a specific type of diffusion that involves the movement of solvent molecules (usually water) across a selectively permeable membrane from an area of lower solute concentration to an area of higher solute concentration.
Whereas diffusion transports material across membranes and within cells, osmosis transports only water across a membrane and the membrane limits the diffusion of solutes in the water. Osmosis is a special case of diffusion.
- Lisa Bartee, Walter Shriner, Catherine Creech
- 2019
Understand the osmosis and diffusion processes. Define tonicity and its relevance to passive transport. Plasma membranes must allow certain substances to enter and leave a cell, and prevent some harmful materials from entering and some essential materials from leaving.
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The rate at which water can move across cell membranes is increased by the presence of membrane proteins called aquaporins that form channels through which water molecules (but not solutes) can pass. Osmosis refers to the passive movement of water across a semipermeable membrane (Figure 7.6).
