Top answers

What is a synapse and how is information transmitted across it?

Synapse = the junction between two neurones (nerve cells) OR the junction between a neuron and an effector cell such as a muscle cell A synapse between two neurones consists of: a presynaptic neuron a post s...
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What are the differences between the structure and function of arteries and veins?

Arteries are blood vessels that carry blood away from the heart . They have thicker walls than veins in order to cope with far higher blood pressure levels. Arteries also have a thicker layer of smooth muscl...
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Answered by William H. • Biology tutor
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What is a pathogen?

An organism that causes disease e.g. bacteria, virus
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Answered by Erin W. • Biology tutor
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Why does an increased heart rate during exercise help muscles contract?

An increased heart rate will cause an increase in blood flow around the body (increased cardiac output). This means that there will be more oxygen and more glucose being supplied to the muscles. Since oxygen...
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Answered by Adam D. • Biology tutor
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Upon perfroming vigorous excercise, an athlete's blood glucose begins to decrease. Describe how the body responds when blood glucose concentration begins to decrease.

pancreas detects low blood glucose, so produces glucagon. glycogen is converted to glucose
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Answered by Holly V. • Biology tutor
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