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The first step with any simultaneous equation is to cancel out one of the variables. Here, 2y is a factor of 4y (it fits into 4y twice) so we can multiply the 1st equation by 2 to give us 4x+4y = 20.This ...

Deoxygenated blood from the body is delivered to the right atrium by the vena cava. The right atrium contracts and blood flows into the right atrium. The right ventricle then contracts and blood is pumpe...

One of the main criticism when writing an answer to an English question is do not write necessary waffle! You want to get to your answer in the most efficient way possible. The best way to do this is to p...

The fight or flight response is triggered when the brain registers a threatening stimulus. It mobilizes the amygdala, sending a message to the hypothalamus which triggers activity in the sympathetic branc...

The loop of Henle is designed so that the water moves out of the thinner walled descending limb by osmosis and then ions such as Na+ and Cl- are actively transported out of the ascending limb. This active...