what is a diffusion
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diffusion diffusion. 1. The process of rapid random movement of the particles of a liquid or gas which eventually form a uniform mixture. 2. The mixing of substances due to the motion of their particles.
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DIFFUSION Diffusion is a process leading to equalization of substance concentrations in a system or establishing in a system an equilibrium concentration distribution that results from random migration of the system's elements. Three types of diffusion are distinguished, viz., molecular, Brownian, and turbulent.
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ZOOL 2404 Mastering A&P Lecture Quizzes Diffusion is the chemical & biological process when molecules from a material move from an area of high concentration (where there are lots of molecules) to an area of low concentration (where there are fewer molecules).Diffusion usually happens in a gas or in a liquid.iffusion is the chemical & biological process when molecules from a material move from an area of high concentration (where there are lots of molecules) to an area of low concentration (where there are fewer molecules).
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Diffusion Diffusion refers to the process by which molecules intermingle as a result of their kinetic energy of random motion. Consider two containers of gas A and B separated by a partition.The molecules of both gases are in constant motion and make numerous collisions with the partition.iffusion refers to the process by which molecules intermingle as a result of their kinetic energy of random motion. Consider two containers of gas A and B separated by a partition.
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- Cell Membranes: Diffusion and Osmosis Part 1: Diffusion Diffusion is a process by which molecules move into or out of cells. To diffuse into or out of a cell, molecules must pass through the cell membrane. Observing the diffusion process in real cells is difficult because they are too small to be seen easily.
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- Diffusion is defined as the the movement of molecules from an area of high concentration to an area of low concentration by random molecular motion. Net diffusion eventually results in a uniform distribution of the solute molecules. Some physical rules govern the rate of diffusion of substances: 1.iffusion is defined as the the movement of molecules from an area of high concentration to an area of low concentration by random molecular motion. Net diffusion eventually results in a uniform distribution of the solute molecules. Some physical rules govern the rate of diffusion of substances: 1.
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Movement of molecules across cell membranes - The Human Physiology Diffusion is essentially the movement of molecules from a region of higher concentration to a region of lower concentration as a result of thermal motion. Diffusion is an important process in human physiology.
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- Facilitated diffusion is a passive process whereby a molecule is  carried across a semi-permeable membrane by a channel or protein  carrier. Like diffusion, this process r…equires no energy, however,  since passive diffusion can drive movement against a concentration  gradient it is not really diffusion. (MORE)
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The Miracle in the Cell Membrane The dissemination of molecules from a denser environment towards a less dense one is generally referred to as diffusion. In cellular diffusion, this means the passage of molecules through spaces between the cell membrane's molecules or else the movement of molecules bound to a carrying protein.
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diffusion the movement of molecules of a particular substance from regions of high concentration to regions of low concentration of that substance, i.e. down a CONCENTRATION GRADIENT. The rate of diffusion in gases is much greater than in liquids, due to differences in their molecular structure.
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Diffusion Diffusion is the spontaneous spreading of something such as particles, heat, or momentum. The phenomenon is readily observed when a drop of colored water is added to clear water, or when smoke from a chimney dissipates into the air.
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- Passive Transport Video. Diffusion is the overall movement of material from an area of higher concentration to an area of lower concentration. The difference in concentration between the two areas is called the concentration gradient; diffusion tends to continue until the concentration gradient is gone.
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Diffusion Diffusion. Photo by: Lansera. Diffusion is the movement of molecules from a region of high concentration to one of low concentration. If you have ever opened a bottle of cologne or perfume, you have witnessed diffusion. Molecules of the scent escape from the container, where they are present in very high concentration.
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Diffusion (+) (−) describes diffusion caused by the difference of the forces applied to molecules of different types. For example, in the Earth's gravitational field, the heavier molecules should go down, or in electric field the charged molecules should move, until this effect is not equilibrated by the sum of other terms.
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Why does diffusion occur in a cell? Diffusion is a physical phenomenon which takes place whenever a concentration gradient for a substance is there. In diffusion, a substance or more specifically, the molecules of that substance move from their region of higher concentration to the region of their lower concentration when place in a fluid.
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Facilitated diffusion Facilitated diffusion (also known as facilitated transport or passive-mediated transport) is the process of spontaneous passive transport (as opposed to active transport) of molecules or ions across a biological membrane via specific transmembrane integral proteins.acilitated diffusion (also known as facilitated transport or passive-mediated transport) is the process of spontaneous passive transport (as opposed to active transport) of molecules or ions across a biological membrane via specific transmembrane integral proteins.
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diffusion diffusion. 1. the state or process of being widely spread. 2. the spontaneous mixing of the molecules or ions of two or more substances resulting from random thermal motion; its rate is proportional to the concentrations of the substances and it increases with the temperature.iffusion. 1. the process of becoming diffused, or widely spread. 2. the spontaneous movement of molecules or other particles in solution, owing to their random thermal motion, to reach a uniform concentration throughout the solvent, a process requiring no addition of energy to the system.
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Where in the human body does diffusion occur? Water, carbon dioxide, and oxygen are among the few simple molecules that can cross the cell membrane by diffusion (or a type of diffusion known as osmosis). Diffusion is one principle method of movement of substances within cells, as well as the method for essential small molecules to cross the cell membrane.smosis is the diffusion of water across a semi-permeable (or differentially permeable or selectively permeable) membrane. The cell membrane, along with such things as dialysis tubing and cellulose acetate sausage casing, is such a membrane. The presence of a solute decreases the water potential of a substance.
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Diffusion and Passive Transport Diffusion is the tendency of molecules to spread into an available space. Without other outside forces at work, substances will diffuse from a more concentrated environment to a less concentrated environment. Passive transport is the diffusion of substances across a membrane. This is a spontaneous process and cellular energy is not expended. Molecules will move from where the substance is more concentrated to where it is less concentrated.
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diffusion diffusion (di·fyōōˑ·zhn), 1  n the tendency of molecules within a gas or liquid to move from an area of higher concentration to one with lower concentration. 2  1. Scattering of light passing through a heterogeneous medium, or being reflected irregularly by a surface, such as a sandblasted opal glass surface.
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- Diffusion is the net movement of molecules or atoms from a region of high concentration to a region of low concentration.his is also referred to as the movement of a substance down a concentration gradient. A gradient is the change in the value of a quantity (e.g., concentration, pressure, temperature) with the change in another variable (usually distance).
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Where in the human body does diffusion occur? Water, carbon dioxide, and oxygen are among the few simple molecules that can cross the cell membrane by diffusion (or a type of diffusion known as osmosis). Diffusion is one principle method of movement of substances within cells, as well as the method for essential small molecules to cross the cell membrane.smosis is the diffusion of water across a semi-permeable (or differentially permeable or selectively permeable) membrane. The cell membrane, along with such things as dialysis tubing and cellulose acetate sausage casing, is such a membrane.
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What Causes Diffusion? Diffusion is caused when heat in a gas or water environment creates energy that is absorbed by particles, making them move. This is referred to as thermal motion. Each particle moves in a different direction, but the direction changes if the particle hits a solid object or another particle.
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- Diffusion, the passive movement of particles from an area of high concentration to an area of low concentration. Particles like to move! Because they like to move, they want t…o spread out as much as possible. Diffusion happens because the particles want to spread into the remaining fluid, (liquid and gas) to an area of low concentration. Another way of thinking, when you spray deodorant, because of the initial pressure that pushes all of the particles out of the can, they spread out in all directions.
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- Diffusion Types. Diffusion is the process by which a characteristic spreads across space from one place to another over time. It is the process of dissemination. Diffusion causes ideas and different cultural customs to be spread from one place to another.
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Molecular diffusion Molecular diffusion, often simply called diffusion, is the thermal motion of all (liquid or gas) particles at temperatures above absolute zero.