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What is a Pacinian corpuscle and how does it work?

The Pacinian corpuscle is a mechanoreceptor, which means it is a sensory receptor that responds to touch, pressure or vibration. Pacinian corpuscles are found deep in the skin, and respond to both pressure a...
Answered by • Biology tutor
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Prove that 1 + tan^2 x = sec^2 x

We know that tan x = sin x/cos x and so tan 2 x = sin 2 x/cos 2 x. We also know that sin 2 x + cos 2 x = 1 because this is a Pythagorean identity. We can rewrite the left hand side as (cos 2 x + sin 2 x)/cos...
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Answered by Eleanor F. • Maths tutor
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Integrate 2x^2 + 4

When we integrate, we raise the power by one and divide the term by the new power. So let's break the question down term by term. When integrating 2x 2 we raise the power by 1 to get 2x 3 . We then divide 2x...
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Answered by Eleanor F. • Maths tutor
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Two people who are heterozygous for retinitis pigmentosa are expecting a baby. Draw a genetic diagram to calculate the probability that the baby will have the condition. Use R for the normal allele and r for the allele for retinitis pigmentosa.

Parents Rr x RrPunnett Square Probability = 1/4
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Answered by Garry M. • Biology tutor
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How should I structure my essay?

Before you answer your exam question, take 5 minutes to plan out your structure. This should include a short introduction to the points that you will be discussing in your essay, making sure that they are in...
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Answered by Sofia B. • English tutor
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