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How are action potentials generated in a neuron?

A stimulus at the receptor end of the neuron causes the membrane to become more permeable to Na+ ions. Because there is a higher concentration of Na+ on the outside of the cell the flood into the cell down t...
AN
Answered by Alexander N. • Biology tutor
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Suggest how the two sub-species have developed from a single ancestral population.

Two populations become separated by a barrier such as sea (geographical separation). As a result populations cannot interbreed, hence gene flow between two populations is prevented. As a consequence, only a ...
MS
Answered by Maja S. • Biology tutor
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write log2(5) +log2​​​​​​​(3) in its simplest form

This is an exapmle of the addition rule as part of the logorithm syllabus. The general rule is log a b + log a c = log a (b*c) When the base of the logarithm is the same and they are added the to numbers of ...
NP
Answered by Nicole P. • Maths tutor
12556 Views

Simplify 3(x-5)/x^2-3x-10

The question is asking us to simplify; in particular, we have to simplify a fraction. We simplify a fraction by cancelling a factor from both the numerator and the denominator. We can apply this algebraicall...
NB
Answered by Nathan B. • Maths tutor
5614 Views

How can you divide an algebraic expression by another algebraic expression?

I would begin the session with checking a basic understanding of the methods of long division, as these will not have been taught very recently. Many students will have been using short division, as it is qu...
JH
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