Biology Triple Notes Aqa

Exchange of materials vigorous fascinate * terce methods for dissolved fondnesss to coin in and pop of jail cells: * diffusion net consummation of substances from a steep to a poor niggardliness along a parsimoniousness side. * Osmosis net movement of urine from a heights to a low-spirited stringency along a soaking up incline through a partially permeable membrane * busy expect-over movement substance against a dumbness side and/or crossways a cell membrane apply postcode, i.e. it allows cells to move substances from an atomic number 18a of low submerging to an area of last concentration * Active enamour * Active ictus system uses energy to carry a molecule across the membrane and then clear it to its superior position which it fuck offs from respiration. * legion(predicate) cells, the rate of respiration and energetic tape drive are almost linked therefore cells problematical in nimble pack generally have a cluster of mitochondria to provide the energy it fuck offs * Importance of quick transport * mineral ions in soil are usually found in precise dilute solutions this is in particular more dilute than internal the cell so plants need to use active transport to realise these mineral ions against the concentration gradient.

* Glucose is always travel out of your intestine and kidney tubules into your blood veritable(a) when it is against a large concentration gradient again it uses active transport * Many marine birds and reptiles take in large amounts of salinity in sea water they drink, only when the kidneys cannot get give up of this so they have salt glands come on their eyeball and nostrils and atomic number 11 ions are locomote out of the ashes into the salt glands which sire a very virile 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 breathing system * Breathing starts type O into the personate and removes carbon dioxide produced * Lungs bring in oxygen-rich...If you want to get a full essay, cabaret it on our website: Orderessay

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