1- The cell membrane is considered semipermeable because: a) It allows the passage of all substances b) It allows the passage of only water c) It allows the passage of some substances while restricting others d) It does not allow the passage of any substances 2- The lipid layer of the cell membrane is mainly composed of: a) Proteins b) Carbohydrates c) Phospholipids d) Cholesterol 3- Integral proteins in the cell membrane: a) Are loosely bound and easily dissociate from the membrane b) pass through the entire thickness of the cell membrane c) Are responsible for the attachment of cells to their neighbors d) Serve as receptor sites for hormones and neurotransmitters

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A:

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A:

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Q: mitosis

A:

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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.