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Enzymes are biological catalysts that hydrolyse chemical bonds in biological molecules, such as lipids. Enzymes are important in digestion, as they aid the absorption of molecules across the lumen of the ...

T helper cells recognise and bind to the antigen and become activated. The activated T helper cell stimulate B cells to form plasma cells that produce and release antibodies that are specific to the viral...

It goes without saying that a thorough knowledge of the subject is important. In order to be able to score all the points for the outline portion of the essay you must be able to describe and explain theo...

Introduction- Ethical statements are not simply expressions of emotion. Although the non-cognitive branch of meta-ethics emotivism claims ethical statements are only expressions of emotion due to no evide...

a stimulus depolarises the membrane potential above the threshold level e.g. -40 mvthis causes voltage gated Na+ ion channels to open- resulting in an influx of Na+ into the cellthis depolarises the membr...