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Explain the similarities and differences between aerobic and anaerobic respiration

The similarities between aerobic and anaerobic respiration, is that they both use glucose as the starting molecule. This is called the substrate. In addition, both aerobic and anaerobic respiration produce A...
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Answered by Suraiyya J. • Biology tutor
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Explain how an action potential is generated

When a neurone is stimulated an action potential is generated by a change in ion concentrations across the cell membrane. The resting membrane potential (the potential of charge across the membrane when the ...
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Answered by Suraiyya J. • Biology tutor
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Describe how the body maintains its water concentration

Homeostasis- is the principle by which the body maintains a constant internal environment in order to provide optimal conditions for the cells and enzymes to function. Water is taken in via drinking and as a...
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Answered by Rayyan A. • Biology tutor
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Describe the processes and forces that allow water movement up a plant stem.

Water moves into the plant stem from the soil, and up to the leaves via the xylem. Water is taken up by the hairs on the root of the plant down the water potential gradient via osmosis, following the active ...
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Answered by Hannah C. • Biology tutor
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Describe the process of insulin secretion. (7 marks)

Beta cells have vesicles containing insulin inside them (1). (2) High glucose levels cause glucose uptake via glucose channels into the beta cell and glucose is metabolised into ATP (3) inside the cell, whic...
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Answered by Gabriella G. • Biology tutor
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