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Describe the steps in a reflex arc.

This question was made using AQA specifications. The reflex arc is a series of events connecting a stimulus to a response. The stimulus, for example a hand touching a hot pan, stimulates the receptor, which ...
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Answered by Frances A. • Biology tutor
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What is the function of bile?

Bile is a substance synthesised in the liver and released by the gall bladder. It is released into the small intestine and helps breakdown large fat droplets into smaller ones, via emulsification. This incre...
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Answered by Shyam P. • Biology tutor
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explain how oxygen moves across from the lungs into the blood? how are the lungs adapted for this?

via diffusion down a concentration gradient as O2 levels are higher in the lungs than in the blood. for faster diffusion you need:a large surface area (lungs have million of alveoli which are air filled sacs...
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Answered by Maaedah K. • Biology tutor
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Compare the causes and treatment of type 1 and type 2 diabetes

Blood glucose levels are controlled by the pancreatic release of the hormone insulin. Insulin is released from the pancreas when blood glucose concentration is high. This causes glucose to move from the bloo...
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Answered by Emily H. • Biology tutor
7421 Views

How is DNA replicated, and why is this method of replication important?

DNA is replicated in a semi-conservative manner, which means that both 'parental strands' are used as templates. This ensures that genetic information is passed onto offspring without any changes (diagram) D...
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Answered by Salima B. • Biology tutor
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