Diffusion and Osmosis Phenomena

What is diffusion primarily concerned with?

What defines a permeable membrane?

Which process specifically refers to the movement of water across a semi-permeable membrane?

What effect does an increase in solute concentration have on osmotic pressure?

What role do plant cell walls play in the process of imbibition?

What is a characteristic of a semi-permeable membrane?

Which substance does NOT easily pass through permeable membranes due to its size?

What is primarily responsible for the movement of water through plant membranes?

Diffusion Phenomenon

Movement of molecules or ions occurs from an area of high concentration to low concentration.
An example is the diffusion of ink in water, demonstrating the gradual mixing of substances.

Permeability Phenomenon

Membranes and walls differ in permeability levels, affecting substance passage.
Characteristics:
- Permeable: Allows free movement of small molecules or ions.
- Impermeable: Prevents passage of larger molecules or ions.

Osmosis Phenomenon

Refers to the movement of water through a semi-permeable membrane.
Key aspects include:
- Osmotic pressure drives water movement based on solute concentration differences.
- Semi-permeable membranes selectively control the passage of substances, allowing water and mineral salts while restricting larger molecules like sugars and amino acids.

Imbibition Phenomenon

Describes the absorption of water by plant cell walls through solid particles.
Influences plant cell volume increase due to water absorption, which is directly proportional to the solute concentration in the solution.
Key aspect of plant hydration and nutrient uptake.

Key Terms

Osmotic Pressure: The pressure resulting from solute concentration differences across a membrane, facilitating water movement.
Cellulose: A key component of plant cell walls, enabling specific permeability properties.

Explore the fascinating concepts of diffusion and osmosis through this quiz. Understand how molecules move between different concentrations and the role of permeability in cellular biology. Test your knowledge with real-life examples and key definitions.