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How does the pancreas affect levels of glucose in the body?

The pancreas is a gland consisting of both exocrine and endocrine tissue. It is responsible for secreting enzymes which are involved in the homeostatic control of blood glucose. In between sections of exocri...
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Answered by Naznin F. • Biology tutor
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Outline how a heartbeat is initiated and controlled

The heart is myogenic, meaning it initiates its own muscle contraction. At the Sinoatrial Node (SAN), found in the right atrium, an electrical impulse is generated that spreads across the atria, causing them...
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Answered by Anna P. • Biology tutor
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Person A and person B both eat the same high glucose meal. Person A's insulin rises dramatically while Person B's does not. Explain a possible reason why and describe what happens to the glucose once it enters their blood streams.

In person A, once the glucose enters the blood stream, the higher glucose level is detected by the beta cells of the islets of Langerhans in the pancreas. These cells respond by synthesising insulin and secr...
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Answered by Jack B. • Biology tutor
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Describe how the presentation of a virus antigen on a cell leads to the secretion of antibodies against this viral antigen

3 mark question - remember to use key words/phrases the examiner will be looking for to give you the marks. Be concise and specific in your answer - make it as easy as possible for the examiner. Helper T cel...
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Answered by Eleanor M. • Biology tutor
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Compare and contrast competitive and non-competitive enzymes inhibitors

Both competitive and non-competitive inhibitors interfere with the functioning of the enzyme's active site, reducing the number of enzyme-substrate complexes that can form. Competitive inhibitors have a shap...
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Answered by Georgia T. • Biology tutor
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