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Explain how the liver aids digestion in the alimentary canal

The liver produces bile.Bile is an alkaline solution that neutralises stomach acid. The HCl in the stomach produces acidic conditions. These acidic conditions are not suitable for the rest of the alimentary ...
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Answered by Oliver E. • Biology tutor
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Proteins are made according to information stored in the DNA structure of genes. Describe the structure of DNA and how DNA determines the structure or proteins-

DNA is made up of nucleotides. Each nucleotide contains a phosphate group, a sugar group and a nitrogen base. The four types of nitrogen bases are adenine (A), thymine (T), guanine (G) and cytosine (C). Nucl...
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Answered by Lena H. • Biology tutor
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How does the heart pump oxygenated blood around the body?

Blood that has been used up by the body (deoxygenated) enters the right side of the heart via a large vein known as the superior vena cava. It enters the right atrium from the top, which then contracts and p...
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Answered by Amber M. • Biology tutor
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Explain how blood glucose level is controlled.

Blood glucose level is controlled by two hormones, insulin and glucagon. These are produced by the pancreas. If the blood glucose (sugar) level is too high, then insulin is released. This causes glucose in t...
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Answered by Amy W. • Biology tutor
2848 Views

Describe how information passes across a synapse

A chemical neurotransmitter is released from the end of one neurotransmitter, and diffuses across the synapse to bind to transmitters on the next neurone to stimulate an electrical impulse.
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Answered by Annabelle K. • Biology tutor
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