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Explain the process of muscle contraction

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 sarcoplasmic reticulum membrane causing calc...
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Answered by Akash K. • Biology tutor
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I looked at AQA higher tier roleplay 15 June 2018

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 repetirlo, ask a que...
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Answered by Clare B. • Spanish tutor
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Why can crude oil be separated by fractional distillation?

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 the ...
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3 teas and 2 coffees have a total cost of £7.80; 5 teas and 4 coffees have a total cost of £14.20. Work out the individual cost of one tea and one coffee.

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 equa...
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Answered by Charlotte F. • Maths tutor
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What is the difference between mitosis and meiosis?

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 and...
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Answered by Abbey B. • Biology tutor
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