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Transport Systems, image, Osmosis, Diffusion, Comparing Osmosis and…
Transport Systems
Similarities
One of the main similarities of Osmosis and diffusion are, that both processes move down a concentration gradient. Both processes are passive transport, they do not require energy. Mineral Salts and water travel up the plant through Diffusion and Osmosis easily. Both processes, equalize both solutions.
Differences
Diffusion does NOT occur with water. It usually occurs with substances such as gases and solutions. Osmosis, on the other hand, ONLY occurs with water molecules. Diffusion does NOT require a semipermeable membrane. However, Osmosis DOES require a partially permeable membrane. Diffusion allows solute and solvent particles both, to freely move across the membrane. Osmosis only allows water particles to move freely across the membrane.
Diffusion is the process by which solutes are moved along a concentration gradient
in a solution or across a semipermeable membrane.
After the food we eat is broken down into smaller pieces it goes through our digestive system and then the food molecules enter our bloodstream through the process of diffusion. After they reach the bloodstream they also enter all the cells also by diffusion.
Concentration Gradient
Concentration Gradient Defined. A concentration gradient is the process of particles, moving through a solution or gas from an area of high concentration to an area of low In passive transport, particles will diffuse down a concentration gradient, from areas of higher concentration to areas of lower concentration, until they are evenly spaced. These areas are commonly distincted by a membrane.
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When we breathe the oxygen that we inhale and the carbon dioxide we exhale are always entering regions of lower and higher concentration. and exiting regions of higher and lower concentration constantly.
Osmosis is the movement of water through a semipermeable membrane according to the Concentration gradient of water across the membrane. (one that allows only some dissolved substances—i.e., solutes).
Osmosis was first thoroughly studied in 1877 by a German plant physiologist, Wilhelm Pfeffer. Earlier scientists had made less accurate studies of osmosis. The term osmose (now osmosis) was introduced in 1854 by a British chemist, Thomas Graham. An example of osmosis is The absorption of water from the soil.
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