Question

What mainly regulates the osmotic expansion of a cell kept in the water?

Answer 1

Water diffusion across a partially permeable membrane from a dilute solution (high concentration of water) to a concentrated solution is referred to as osmosis (low concentration of water). The sugar concentration is initially higher on the right side of the membrane in the diagram.

Complete answer:
In a cell kept in water, the principal regulator of osmotic expansion is the vacuole. It's a single, large organelle that makes up roughly 20% of plant cells, while it's modest and numerous in animal cells. The vacuole stores water and macromolecules such as ions, sugar, amino acids, proteins, and carbohydrates. The vacuole is surrounded by a membrane called the tonoplast. The vacuole contains Ell sap. Turgor pressure in plant cells is caused by the high osmotic pressure of cell sap.

In the cytoplasm, the vacuole is a membrane-bound compartment. If retained in water, it controls a cell's osmotic expansion.

Vacuoles are primarily responsible for a cell's osmotic expansion when kept in water. In the cytoplasm, vacuoles are non-cytoplasmic regions. Tonoplasts are what separate them from the latter. They are supposed to be generated by the endoplasmic reticulum pinching off and expanding. In-plant cells, there are multiple tiny vacuoles and one giant vacuole (central). They play a role in the cell's osmotic expansion.

Vacuoles are cytoplasmic non-cytoplasmic regions separated from the latter by tonoplast. They are thought to have originated as a result of ER expansion and pinching off. In-plant cells, there is a big central vacuole and several smaller vacuoles. They serve a crucial function in cell osmotic growth.
When a semipermeable membrane separates a solution from pure water, osmotic pressure is defined as the pressure that must be applied to the solution side to cease fluid movement.

Note: Solute concentration and temperature are two elements that influence osmotic pressure. The amount of solute particles in a unit volume of a solution determines the solution's potential osmotic pressure directly. The osmotic pressure rises as the temperature rises.