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Describe how the body responds when a decrease in core body temperature is detected. (6 marks)

When the core body temperature falls below the optimum, vasoconstriction occurs meaning blood flow to the vessels supplying the skin is reduced. This is beneficial as it reduces lost energy. The body also re...
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Answered by Amy W. • Biology tutor
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Describe the mechanism of inhalation.

The external intercostal muscles contract, pulling the ribs upwards and outwards. At the same time the muscles of the diaphragm contract, pulling the diaphragm down and causing it to flatten. Both of these a...
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Answered by Isabelle J. • Biology tutor
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What is the difference between meiosis and mitosis?

Function: Mitosis is used in the replication of body cells. It occurs every day to replace cells that have died or have been damaged, for growth and also in asexual reproduction. Meiosis is used to produce g...
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Answered by Amy A. • Biology tutor
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What are 2 functions of bile?

Bile is alkaline, so it neutralises the hydrochloric acid from the stomach. This creates the right pH for the enzymes working in the intestine. As well as this, bile is an emulsifier. It breaks up big drople...
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Answered by Megan T. • Biology tutor
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Why is the human circulatory system a double system?

The human circulatory system consists of the heart - a pump and a series of tubes - the blood vessels containing the blood. There is an atrium and a ventricle on each side of the heart and the two sides can ...
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Answered by Yuhui Z. • Biology tutor
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