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Variation among genes codes for different phenotypes in a population. Individuals that have a phenotype that is better suited to their environment are more able to survive and reproduce, and therefore, ha...
The resting potential of a neurone is -70 mV, which means that it's more negative in the cytoplasm than in the tissue fluid. In the membrane there are sodium-potassium pumps which work using active trans...
Metaphase is the third stage of mitosis, following Interphase and Prophase. During interphase, the cell replicates its organelles and centrosomes and synthesis of specific proteins for mitosis occurs. Dur...
The water potential of blood rises. This is detected by osmoreceptors in the hypothalamus in the brain. This detection stimulates less ADH to be released. ADH is Antidiuretic H...
The action potential travels down the presynaptic neuron, depolarising the membraneCauses voltage-gated calcium channels to openCalcium ions cause the neurotransmitter to fuse with the membraneThe neurotr...
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