Table of Contents
What is diffusion and how it occurs?
Diffusion is the movement of a substance from an area of high concentration to an area of lower concentration . Diffusion occurs in liquids and gases when their particles collide randomly and spread out. Diffusion is an important process for living things – it is how substances move in and out of cells.
How does diffusion occur and provide an example of it?
Perfume is sprayed in one part of a room, yet soon it diffuses so that you can smell it everywhere. A drop of food coloring diffuses throughout the water in a glass so that, eventually, the entire glass will be colored.
Where does simple diffusion occur in the body?
In the liver, waste material, urea, is excreted onto the blood by the process f simple diffusion. Similarly, in kidneys, removal of waste chemicals and toxins and absorption of water occurs via simple diffusion. A separate active transport also occurs in some parts of the kidneys.
How does diffusion occur in the lungs?
Once in the lungs, the air travels through a series of increasingly smaller structures called bronchioles. It eventually reaches tiny sacs called alveoli. From the alveoli, the oxygen from the air you breathe enters your blood in nearby blood vessels. This is a process called oxygen diffusion.
Why does diffusion occur quizlet?
Diffusion occurs because molecules are always bumping into each other and moving from one to another concentration.
Why would diffusion not occur?
Explanation: Diffusion is the movement of particles from an area of high concentration to an area of low concentration, as the atoms in a solid are stationary (they vibrate in a regular arrangement due to being the state with the least energy), the particles cannot move and therefore cannot diffuse.
What must there be for diffusion to occur?
Diffusion occurs due to random kinetic energy in the molecules. Net diffusion will always occur. from high to low concentration. When there are areas of high and low concentration of solute, a concentration gradient exists.
What are facts about diffusion?
If you like to talk about science, check Facts about Diffusion. The term diffusion is defined as the new movement of atoms or molecules from high chemical potential to a low chemical potential . The latter is defined as a region with low concentration , while the former one is used to call a region with high concentration.
What is required for a facilitated diffusion to occur?
Simple diffusion does not require energy: facilitated diffusion requires a source of ATP . Simple diffusion can only move material in the direction of a concentration gradient; facilitated diffusion moves materials with and against a concentration gradient.
What variables affect the rate of diffusion?
Several factors that affect the rate of diffusion include temperature, density of the diffusing substance, medium of diffusion and concentration gradient.