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Nov 21, 2023 · Diffusion is defined as the movement of atoms, ions, and molecules from a region of high concentration to a region of low concentration, or ‘down their concentration gradient ’. The word ‘diffusion’ is derived from the Latin word, ‘diffundere’, meaning ‘to spread out’. The random movement of ‘molecules existing in any state of ...
- Simple Diffusion
Q1. How is simple diffusion different from active...
- Kinetic Energy
When force is applied, it does work on the object. Work...
- Facilitated Diffusion
It is a type of diffusion occurring in living cells where...
- Simple Diffusion
Diffusion occurs in gases like air and liquids like water because their particles can move around and collide with each other randomly. For example, if you mix two drinks, the liquids diffuse into ...
- Diffusion Definition
- Examples of Diffusion
- Factors That Affect Diffusion
- Functions of Diffusion
- Related Biology Terms
- Quiz
- References
Diffusion is a physical process that refers to the net movement of molecules from a region of high concentration to one of lower concentration. The material that diffuses could be a solid, liquid or gas. Similarly, the medium in which diffusion occurs could also be in one of the three physical states. One of the main characteristics of diffusion is...
Diffusion is an important part of many biological and chemical processes. In biological systems, diffusion occurs at every moment, across membranes in every cell as well as through the body. For example, oxygen is at a higher concentration inside arteries and arterioles, when compared with the oxygen levels in actively respiring cells. By the time ...
Diffusion is affected by temperature, area of interaction, steepness of the concentration gradient and particle size. Each of these factors, independently and collectively can alter the rate and extent of diffusion.
Diffusion in the human body is necessary for the absorption of digested nutrients, gas exchange, the propagation of nerve impulses, the movement of hormones and other metabolites towards their target organ and for nearly every event in embryonic development.
Concentration Gradient– Gradual decrease in the concentration of a substance, often a solute in a solution. Within living systems, this gradient is usually seen on two sides of a semi-permeable lip...Hepatocytes– Cells in the inner parenchymal region of the liver, making up a large proportion of liver mass. Involved in the digestion and metabolism of proteins, lipids and carbohydrates. They als...Integral Membrane Protein– Proteins that span the width of a membrane and are important structural and functional parts of biological membranes.Sublimation– The conversion of a material in its solid phase directly into the gaseous state, without an intervening transition into the liquid state.1. Which of these statements about diffusion of molecules is true? A. Facilitated diffusion is powered entirely by GTP hydrolysis B. Never needs the presence of any other molecule C. Diffusion of every molecule is dependent on its concentration gradient and independent of the concentration of other molecular species in the medium D.All of the above...
Mehrer, H. and Stolwijk, N. A. (2005). “Heroes and Highlights in the History of Diffusion”. Diffusion Fundamentals2, 1.1–1.10.Philibert, J. (2009). “One and a Half Century of Diffusion: Fick, Einstein, before and beyond”. Diffusion Fundamentals11 (1):1-32.Spaeth, E. E., and Friedlander, S.K. (1967). ” The Diffusion of Oxygen, Carbon Dioxide, and Inert Gas in Flowing Blood”. Biophys J.7(6): 827–851.Mar 27, 2019 · Diffusion, in biochemistry, refers to one of many processes by which molecules can move into and out of cells through the plasma membrane, or cross membranes within the cell, such as the nuclear membrane or the membrane that encloses mitochondria. Think of diffusion as a "drifting" movement. While it refers to a random and unguided process, and ...
Diffusion is a property of substances in water; substances in water tend to move from an area of high concentration to an area of low concentration.[23] Blood flows by one side of a semi-permeable membrane, and a dialysate, or special dialysis fluid, flows by the opposite side.
This can be within a cell or between them. Diffusion only happens in liquids and gases because their particles move randomly from place to place. It is an important process for living things; it ...
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diffusion, process resulting from random motion of molecules by which there is a net flow of matter from a region of high concentration to a region of low concentration. A familiar example is the perfume of a flower that quickly permeates the still air of a room. Heat conduction in fluids involves thermal energy transported, or diffused, from ...
