define diffusion Related: Short Notes - The Fundamental Unit of Life?

Question

define diffusion Related:  Short Notes - The Fundamental Unit of Life?

Answer

Diffusion is the movement of particles from the region of higher concentration to the region of lower concentration on its own.

Answer

The intermixing of particles of different substance is called diffusion.

Answer

Diffusion

Diffusion is the process by which particles move from an area of higher concentration to an area of lower concentration. It is a passive process, meaning it does not require any energy input.

Key Points:
- Diffusion occurs in both liquids and gases, as well as in living organisms.
- It plays a crucial role in various biological processes, such as respiration, photosynthesis, and the exchange of nutrients and waste products in cells.

Factors Affecting Diffusion:
Several factors influence the rate of diffusion:
1. Concentration Gradient: The greater the difference in concentration between two areas, the faster the rate of diffusion.
2. Temperature: Higher temperatures increase the kinetic energy of particles, leading to faster diffusion.
3. Molecular Size: Smaller molecules diffuse more quickly than larger ones.
4. Medium: The type of medium that the particles are diffusing through can affect the rate of diffusion. For example, diffusion occurs faster in gases than in liquids.

Diffusion in Living Organisms:
Diffusion is essential for the survival of living organisms as it allows for the movement of molecules across cell membranes. Some key examples include:
1. Gas Exchange in the Respiratory System: Oxygen diffuses from the lungs into the bloodstream, while carbon dioxide diffuses out of the bloodstream into the lungs to be exhaled.
2. Nutrient Absorption in the Digestive System: Nutrients from digested food diffuse through the intestinal wall into the bloodstream.
3. Waste Removal: Waste products, such as urea, diffuse out of cells and into the bloodstream for excretion.

Importance of Diffusion:
Diffusion is crucial for maintaining homeostasis in living organisms. It allows for the transport of necessary molecules and the removal of waste products. Without diffusion, cells would not be able to obtain the nutrients they need or eliminate waste efficiently.

Conclusion:
Diffusion is the passive movement of particles from an area of higher concentration to an area of lower concentration. It is a vital process in various biological systems and plays a crucial role in maintaining the balance and functionality of living organisms.

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