Osmosis is the process of movement of water molecules from its:

A. Higher concentration to its lower concentration through a cell wall

B. Lower concentration to its higher concentration through a fully permeable membrane

C. Higher concentration to its lower concentration through a fully permeable membrane

D. Higher concentration to its lower concentration through a semi-permeable membrane

Osmosis is the movement of water from high concentration to low concentration across a semipermeable membrane, influenced by solute concentrations. This process is essential for maintaining cell integrity and function. Understanding how osmosis works is key in both cellular biology and physiology.

Explanation:

Understanding Osmosis

Osmosis is a process that specifically refers to the movement of water molecules through a semipermeable membrane from an area of higher concentration of water (which equates to a lower concentration of solutes) to an area of lower concentration of water (or conversely, a higher concentration of solutes). This movement occurs without the input of energy and is driven by the concentration gradient of water molecules.

The semipermeable membrane allows water to pass through while restricting the movement of solute particles. This is crucial in biological systems, as cells often need to maintain specific concentrations of solutes and water to function properly.

Examples of Osmosis

For example, in a hypertonic solution, where the surrounding solution has a higher concentration of solutes than the inside of the cell, water will move out of the cell, causing it to shrink. Conversely, in a hypotonic solution, where the outside solution has a lower concentration of solutes, water will move into the cell, possibly leading to swelling and bursting.

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