Osmosis

Definition

Osmosis is the movement of water molecules through a semipermeable membrane from a region of lower solute concentration to a region of higher solute concentration. It is essential for maintaining cellular homeostasis.

5 Must Know Facts For Your Next Test

1. Osmosis helps regulate fluid balance in cells, crucial for homeostasis.
2. It occurs through a semipermeable membrane that allows only specific molecules like water to pass through.
3. Osmotic pressure can affect the shape and function of cells, influencing drug efficacy.
4. In medical treatments, isotonic solutions are often used to avoid disrupting osmosis in body cells.
5. Abnormal osmosis can lead to conditions such as edema or dehydration.

Review Questions

• What role does osmosis play in maintaining cellular homeostasis?
• How does osmotic pressure impact pharmacological treatments?
• Why are isotonic solutions important in medical treatments?

Related terms

Diffusion:

The movement of particles from an area of higher concentration to an area of lower concentration.

Semipermeable Membrane:

A barrier that allows some substances to pass through while blocking others.

Isotonic Solution: A solution with the same solute concentration as another solution, preventing osmotic flow across membranes.