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Prokaryotic cells (bacteria) are exclusively unicellular whereas eukaryotic cells can display attributes of both multicellular and unicellular of a bigger and more complex structure. Eukaryotes are disti...

Action potential reaches pre-synaptic knob.This stimulates voltage gated Ca2+ channels to open and Ca2+ to diffuse in.This causes vesicles containing ACh to bind to the pre-synaptic membrane and release A...

The Mitochondria main function is to produce energy for continuation of chemical reactions within the cell and body, as well as movement of an organism. This energy is stored in the form of ATP, the mitoc...

Auxin is a plant hormone that is often made in the growing tips of roots and stems, the hormone can then diffuse to other parts of the plant. It controls the growth of plants by promoting cell division an...

Tobacco smoke contains nicotine. Nicotone makes platelets 'sticky' and more likely to form 'blood clots' which can block arteries in the heart, causing a myocardial infarction (heart attack) as well as bl...