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An action potential (electrical impulse) arrives at a synapse (a gap between two neurones) which causes calcium voltage-dependent gates to open in the presynaptic neurone. An influx of calcium ions trigge...
The reflex arc is designed for quick, reactive movements that are instinctive. E.g. when we touch a hot pan, we need to react quickly otherwise our hand will get really badly burned. If the signal went fr...
Rough endoplasmic reticulum, Mitochondria, Golgi apparatus
Functions of plant cell organellesCell membrane: Controls the movements of substances in and out of the cell Cytoplasm: thick substance where chemical reactions occur.<...
-DNA (Deoxyribose nucleic acid) is a structure made up of a sugar-phosphate backbones linked to one of four chemical bases (adenine, thymine, guanine or cytosine) DNA has a double helix structure that coi...
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