Ions cannot cross directly through a lipid bilayer, yet we know they travel in and out of cells. Which of the following is/are true about how ions diffuse cross membranes?   a)  They diffuse down their concentration gradients.   b)  They diffuse through channels formed by integral membrane proteins.   c)  They diffuse down their electrical gradients.   d)  a and c   e)  a, b and c

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Q: In osmosis, water moves from a ---------------- solution to a --------------------- solution

A: To find: The movement of water in osmosis

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Q: Water moves molecules passively across a cell membrane by: a)osmosis

A:

Q: Distinguish between simple diffusion (SD), facilitated di

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Osmosis

In simple words, osmosis is the slow, gradual movement of a liquid through a membrane. But there are nuances to this process. For instance, there has to be an imbalance in the distribution of solute in the liquid on either side of the membrane, which has to be semipermeable. The liquid in the region with a lower solute concentration moves to the region with a higher concentration, thereby displacing the solution in the process. The objective is to equalize the concentration of molecules on both sides of the membrane; the displacement of liquid can be viewed as a byproduct of this equalization. Since there is no energy required to carry osmosis, it is considered a passive process.