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-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...
The left atrium has a higher pressure than the left ventricle due to the atrium filling with blood and contractingThis causes the atrioventricular valves (the mitral/bicuspid valve in the left side of the...
Myelination allows saltatory conduction to occur, which is when the impulse 'jumps' along the axon using the nodes of Ranvier. The myelin also acts as an electrical insulator.
Beta cells store insulin in vesiclesAt normal blood glucose concentration (BGC), K+ channels are open, so K+ can diffuse out of the cell to maintain the potential difference (PD) at -70mVWhen the BGC rise...
Long answer questions (6+ marks) can normally be split into 3 marks for basic content and 3 marks for reasons. Long answer questions will also be assessed on quality of written communication - this means ...
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