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Describe how action potentials are initiated and transmitted within a neurone, mentioning the appropriate ions and types of ion channels

A stimulus causes a small influx of sodium ions into the cell, leading the cell to become more depolarised or more positive. If this reaches the threshold potential, of about -55 mV, then it will initiate...

RM
Answered by Roxanne M. Biology tutor
2538 Views

Compare the use of setting by Attwood in The Handmaid's Tale and Orwell in 1984.

Both "The Handmaid's Tale" and "1984" are dystopian novels set in the near-future. The characters in each novel are subject to extreme supervision and control by the governments in pow...

BC
5380 Views

How do I prepare for an Imperial College London Medical School Interview?

The interview is a 15 minute panel interview with 4 or 5 interviewers.They will ask the generic questions of why you want to study medicine and why you want to come to this specific university - so make s...

WW
3222 Views

Describe that lock and key hypothesis

Enzymes are biological catalysts, which means that they increase the rate of a specific reaction by lowing the required activation energy.
The lock and key hypothesis explains how the substrate (key)...

WW
Answered by William W. Biology tutor
7406 Views

Show that (sec(x))^2 /(sec(x)+1)(sec(x)-1) can be written as (cosec(x))^2.

( sec2(x))/((sec(x)+1)(sec(x)-1))Then, by the rule of 'difference of two squares', we know that this equals= (sec2(x))/(sec2(x)-1)= (sec2x/tan2x)s...

RS
Answered by Rishi S. Maths tutor
10874 Views

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