Brefily describe diffusion, Biology

Assignment Help:

Brefily describe diffusion ?

Diffusion :  Diffusion is the process in which there is a net movement of particles of a substance from an area of higher concentration to an area of lower concentration. When a difference in concentration is present from one part of a system to another, the gradual change in concentration is called a concentration gradient. When a solute diffuses from the higher concentration to the lower one, it is said to move down the concentration gradient, or sometimes simply "downhill." After a while, the diffusing substance becomes fully dispersed and the system is said to be in equilibrium.

The size of a given particle can be as small as a molecule, or much larger. Diffusion occurs because all of the tiny particles are in constant motion due to kinetic energy, bombarding each other and rebounding in different directions. The overall net movement results in the particles becoming evenly distributed if given sufficient time.

Since the movement of particles is the result of kinetic energy, the rate of diffusion is a function of the amount of heat energy in a system. This can easily be demonstrated by filling three glasses with water, one with hot water, one with water at room temperature, and one with cold water. Drop exactly one drop of food coloring in each of the glasses of water and observe in which glass the food coloring diffuses the fastest to become evenly colored.

Brownian movement refers to the vibration and oscillation of microscopic particles, which is observable under the light microscope using India ink.

 


Related Discussions:- Brefily describe diffusion

Explain glucose molecule runs the krebs cycle twice, Why can it be said tha...

Why can it be said that each glucose molecule runs the Krebs cycle twice? Every glucose molecule "cycles" the Krebs cycle twice because after glycolysis each used glucose has g

What is the optimum temperature for catalyses, What is the optimum temperat...

What is the optimum temperature for catalyses? For any chemical reaction, the reaction rate enhances with temperature, so the higher the temperature, the faster the rate. For a

Pericardium, The heart is enclosed in a membranous sac called the pericardi...

The heart is enclosed in a membranous sac called the pericardium. It has two layers- the fibrous pericardium which is the outer layer and the serous pericardium that lies inside th

Theory of embryology - organizer theory, ORGANIZER THEORY - It was p...

ORGANIZER THEORY - It was propounded by spemann (1901). He was given Nobel prize of 1935 for this wrok. He studied the embryonic development of frog, newt & other amph

Tetrasaccharides, TETRASACCHARIDES The oligosaccharides are formed b...

TETRASACCHARIDES The oligosaccharides are formed by condensation of four monosaccharides. T rachyos e is a nonreducing tetrasaccharide found in plants as transport ca

Prevention of iron deficient anaemia, Prevention   You as nurse needs t...

Prevention   You as nurse needs to ensure that iron supplementation  is given to children who are at risk for iron deficiency.  Iron supplementation  should start between 4 and

Nutrion, what are the different modes of nutrition

what are the different modes of nutrition

Cladogram help, Recent molecular analyses indicate that the artiodactyls, w...

Recent molecular analyses indicate that the artiodactyls, which include hippos and camels, are paraphyletic, whereas cetaceans are monophyletic and cetaceans and hippos form a clad

What are energy allowance, Energy Allowance: Energy Allowance: The  p...

Energy Allowance: Energy Allowance: The  patient's requirement for  energy  varies with the physical activity and physiological condition. For instance, consider a person con

Define the prevention of diseases - function of vitamin e, Define the Preve...

Define the Prevention of diseases - Function of Vitamin E? Because of its anti-oxidant function and its role in inhibiting cell proliferation of smooth muscles, vitamin E can b

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd