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How does the body control blood sugar

In order to maintain homeostasis, which in this case means a stable blood glucose, certain hormones must be released in situations which alter blood glucose. This occurs most commonly after a meal (increase)...
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Answered by Georgie W. • Biology tutor
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Describe how the small intestine is adapted for efficient glucose absorption. (3 marks)

The small intestine has a very large surface area to increase the amount of area that glucose can diffuse out of the small intestine into the bloodstream. The large surface area is created by villi, which ar...
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Answered by Morgan H. • Biology tutor
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Explain why the number of organisms typically reduces along a food chain

The number of organisms reduces because between each level of the food chain about 10% of energy is lost through movement, through not the full organism on the previous level being eaten as bones and hair ar...
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Answered by Anna S. • Biology tutor
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Explain how DNA is replicated within the cell.

DNA is replicated within the nucleus of the cell through a process called semi-conservative replication. The first part of the process involves the splitting of the double stranded molecule into two separate...
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Answered by Callum B. • Biology tutor
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Describe mechanisms used by the body to prevent entry of pathogens

Mucous in the trachea traps pathogens Microorganisms in food are killed by stomach acidThe skin forms a physical barrier against pathogens
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Answered by Obioma N. • Biology tutor
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