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Why may a rise in testosterone above normal cause a subsequent decrease in the hormone?

This is a question from the AQA June 15 Biology A level past paper. Short answer: Raised testosterone causes a physiological decrease in GnRH as well as LH and FSH via negative feedback. Detailed answer: To ...
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Answered by Dhiluni K. • Biology tutor
4422 Views

How do I tackle interview questions that ask me for an example where I showed a particular skill?

Whether panel interviews or MMIs, medical school interviews will almost certainly invovle "behavioural questioning" style questions. These questions ask you to draw on an experience from the past t...
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How do I solve 3x + y = 11 & 2x + y = 8?

In order to solve this set of simultaneous equations, we will rearrange each equation to use substitution. The aim of this problem is to find out what the value of x and y is. Let's rearrange equation 1 and ...
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Answered by Naomi O. • Maths tutor
14919 Views

How can I factorise a quadratic equation?

A quadratic equation is an equation of the form y = a x 2 + b x + c where a, b and c are constants (for example 5, -2 or 0). To "solve" a quadratic equation we are finding the values of x that sati...
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Answered by Tom R. • Maths tutor
3724 Views

How do I prepare for an essay question based on an unseen text?

When preparing for an essay question that is based on an unseen text, many students see this as a daunting concept, as I did when studying for my A levels too! However, in reality, you will know the text a l...
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