The inward movement of solvent molecules through the plasma membrane of a cell
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Solution
Plasma membrane:
It is a selectively permeable membrane restricting the movement of certain molecules in and out of the cell.
It acts as a barrier that separates the inner cell and it organelles from the outer environment.
It functions to regulate the exchange of substances in a cell and keeps toxic and harmful substances out of the cell.
Endosmosis:
The inward movement of water molecules through a semi-permeable membrane when placed in a hypotonic solution is called endosmosis.
Endosmosis plays a vital role in the absorption of water by the root hairs in plants.
The soil can be considered a hypotonic solution hence, water moves in the inward direction i.e., into the root hair cells and hence, absorption takes place.
Final answer:
The inward movement of solvent molecules through the plasma membrane of a cell Endosmosis.