Biology Triple Notes Aqa

Exchange of materials vigorous fascinate * Three methods for dissolved substances to notes in and prohibited of jail cellular telephones: * Diffusion net course of substances from a steep to a low niggardliness along a denseness side. * Osmosis net movement of water from a high to a low preoccupancy along a concentration incline through a partially pervious membrane * prompt agent carry-over movement substance against a concentration gradient and/or across a cell membrane using energy, i.e. it allows cells to move substances from an ara of low concentration to an area of high concentration * Active enamour * Active conveyance of title system uses energy to carry a jot across the membrane and then return it to its superior berth which it gets from respiration. * Many cells, the rate of respiration and active transport are closely linked therefore cells involved in active transport generally turn out a cluster of mitochondria to interpret the energy it needs * Importance of active transport * mineral ions in soil are usually found in precise dilute solutions this is especially more dilute than within the cell so plants need to use active transport to realise these mineral ions against the concentration gradient.

* Glucose is always moved out of your intestine and kidney tubules into your blood even when it is against a large concentration gradient again it uses active transport * Many devil dog birds and reptiles take in large amounts of brininess in sea water they drink, only when the kidneys cannot ge! t rid of this so they have salt glands come on their eyes and nostrils and sodium ions are moved out of the ashes into the salt glands which produce a very strong salt solution sodium ions need to be moved against a huge concentration gradient so active transport is vital Exchange of gases in the lungs * The cellular respiration system * Breathing demands oxygen into the personate and removes carbon dioxide produced * Lungs bring in oxygen-rich...If you want to get a full essay, graze it on our website: OrderCustomPaper.com

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