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Nerve impulses travel along the muscle fibre membrane (sarcolemma). The impulse is carried down into the fibre through T-tubules. Impulses are spread along the sa...
General tips before we begin! means you have to respond to something you haven't seen before and ? means you need to ask a questiontú? Is allowed for questionSelf correction, ask puedes r...
Crude oil is composed from hydrocarbons of varying chain length. Hydrocarbons with longer chains have higher boiling points due to the increasing strength of intermolecular forces with length, therefore t...
The question can be written algebraically, as:(a) 3t + 2c = 7.80(b) 5t + 4c = 14.20To work out the individual costs, we need to make one of the sets of variables equal. We can do this by multiplying the e...
Mitosis and meiosis are both types of cell division.Cells that divide by mitosis produce 2 identical daughter cells - these cells have the same number of chromosomes. These cells are important for growth ...
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