What is another term for the diffusion of water?
Group of answer choices
osmosis
endocytosis
exocytosis
aquacytosis
The correct answer and explanation is:
The correct answer is osmosis.
Osmosis is the process through which water molecules move across a semi-permeable membrane from a region of lower solute concentration to a region of higher solute concentration. This movement occurs in order to balance the solute concentrations on either side of the membrane. Osmosis is a vital process in biological systems, particularly in maintaining the proper hydration and function of cells.
Osmosis occurs naturally without the expenditure of energy, making it a passive process. The semi-permeable membrane allows water molecules to pass through but generally restricts the passage of larger molecules or ions. Because the movement of water is driven by concentration gradients, osmosis continues until equilibrium is reached, meaning the concentration of solutes is the same on both sides of the membrane.
In the context of living organisms, osmosis plays a crucial role in processes such as nutrient absorption, waste removal, and regulation of fluid balance. For instance, in the kidneys, osmosis is essential for the reabsorption of water, helping to conserve water and maintain the body’s fluid balance.
Endocytosis and exocytosis, on the other hand, are active processes that involve the movement of larger particles into or out of the cell via vesicles, which is not the case in osmosis. Aquacytosis is not a standard scientific term related to the movement of water in biological systems, making it an incorrect choice.
Overall, osmosis is a critical phenomenon for maintaining homeostasis within cells, ensuring that they can function effectively by controlling their internal water balance.