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You only kill off the ones that are reactive to host antigens (read: the ones that would attack your own cells!). So normal lymphocytic function isn't affected.

Because of the nature of the immune ...

While atrial repolarisation exists, you actually can't see it in the ECG! I can draw you a diagram of a normal cardiac cycle: this is the P wave, that you'll know represents the DEpolarisation of the atri...

Re-arrange (1) : y = 2x + 4 Square both sides: y^2 = 4x^2 + 16 Substitute (1) into (2) and simplify: 2x^2 + 9x + 4 = 0 Factorise the equation: (2x+1)(x+4) = 0 Solve for x: x = -1/2 and x = -4 Substitute t...

The Second World War broke out in September 1939 following Adolf Hitler's invasion of Poland. Fascist Italy and Nazi Germany were allies, and had been since the Pact of Steel in May 1939. As a result, Ita...

Your essay plan should not take up too much of your time, but at the same time it is essential you have a plan. It will provide for a more organised essay and will serve as an outline of a structure you c...