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How do I tackle questions that seem only vaguely related to the course I've covered?

These questions are particularly stressful, because they seem completely random. But the most important thing to do is relax and think back to your syllabus. Can you make any links to the topic at hand and s...
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Answered by Juliet S. • Biology tutor
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Explain how an action potential is propagated across a synapse in a muscles (3 marks)

Any three of the following, in the correct order. Action potential arrives at the pre-synaptic membrane Causes the voltage gated Ca2+ channels in the pre synaptic terminal to openCa2+ enters the pre synaptic...
Answered by • Biology tutor
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Why does the haemoglobin dissociation curve shift to the right when an individual exercises.

The concentration of carbon dioxide in a persons bloodstream rises during exercise. The carbon dioxide molecules interact with substances in the bloodstream to form carbonic acid. This causes the blood to be...
Answered by • Biology tutor
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Describe the structure of an antibody and relate it to it's function.

An antibody is a Y shaped protein which has a constant region and a variable region . The variable region of an antibody is of a complementary shape to a specific pathogenic antigen and this allows the antib...
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Answered by Laila R. • Biology tutor
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Explain how capillaries are adapted to their function of exchanging substances, giving 3 examples.

Firstly, capillaries are one cell thick and so this makes them very thin. This reduces the diffusion pathway between the capillary and other cells thus allowing efficient diffusion. Secondly, capillaries als...
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Answered by Rebecca C. • Biology tutor
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