During diffusion, when the concentration of molecules on both sides of a membrane is the same, the molecules will stop moving across the membrane
Further Explanation:
The transport of molecules can either be active or passive transport. Passive transport refers to the movement of the ions or other molecules across the membrane without any input of the energy.
Passive transport can be of 3 types:
- Simple diffusion
- Facilitated diffusion
- Osmosis
The process of diffusion is movement of a molecule or substance from higher concentration of an area to lower concentration area. Mostly diffusion occurs in gases and liquid. This process is very important for living things. The concentration gradient is referred as difference in the concentration of substance. The process of Diffusion cease when the concentration of molecule or substance is equal in both region.
Osmosis refers to the spontaneous movement of the solvent particles via a semi-permeable membrane from a lower to the higher region of concentration, in the direction which tends to maintain equilibrium onto both sides.
For a cell to live, the ion concentrations outside and inside the cell should be same. Also, the water content is limited because higher concentration of water can burst and swell the cell. Osmosis is crucial in the biological systems as the membranes are semi permeable. Also, focus on maintaining the equilibrium on both sides and prevent bursting of the cell.
Similarity between both the processes is that they allow the movement of solution or gases from high to low concentration. The concentration gradient acts in both processes to maintain equilibrium.
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Answer Details:
Grade: High School
Subject: Biology
Chapter: Membrane transport
Keywords:
Diffusion, concentration, molecule, facilitated diffusion, simple diffusion, osmosis, passive transport, active transport, membrane, cell biology.