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Degree: MScR Biological Sciences (Masters) - Durham University
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The basic principle about chemical reactions is that whatever goes in one end, will undoubtedly come out the other!
The simplest way to make sure your reactions are correct is to count what you have on each side. Your reaction needs to be balanced, meaning that the number of atoms needs to remain constant throughout. So, for example, if you have eight carbon atoms on one side, make sure you also have eight carbon atoms on the other side as well.
Deviation from homeostasis causes the activation of feedback loops in order to restore equilibrium to the organism.
An example of a negative feedback loop is the homeostasis of blood glucose; the increase in glucose levels stimulate the production of insulin by the pancreas, which in turn causes the uptake of glucose by tissue cells and the formation of glycogen in the liver. This process is repeated until blood glucose levels return to normal, where there is no excess glucose to stimulate insulin production.
Contrary, a positive feedback loop causes amplification of its causal stimulus. An example of a positive feedback loop is the propagation of nerve action potential;a small secretion of sodium ions through sodium channels on a nerve fibre causes a change in the membrane potential, which in turns leads to the further opening of sodium channels and an explosion of sodium ions. When the ammount of internal sodium drops, the membrane action potential reverses and the sodium channels close.see more
Your personal statement is all about conveying why you are a good candidate for what you're applying to, but this doesn't mean you should only be focusing on your academic achievements! Extra-curricular activities, personal hobbies, and even experiences that impressed you are all worth mentioning in your attempt to bring the following point across; "I am interested in this, and here's why".
A well-rounded personal statement is the mark of an open minded individual, and universities tend to seek out students who exhibit not only a passion for their subject of choice, but for learning and challenging themselves in general.
So while focusing on your academic interests and achievements is definitely essential, it's always a good idea to talk about other things that fascinate you in life, whether it be competing in your favourite sport or trying to make sense of the science behind Star Trek.see more