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The reflex arc is a series of events connecting a stimulus to a response. The stimulus, for example a hand touching a hot pan, stimulates the receptor...

Bile is a substance synthesised in the liver and released by the gall bladder. It is released into the small intestine and helps breakdown large fat droplets into smaller ones, via emulsification. This in...

via diffusion down a concentration gradient as O2 levels are higher in the lungs than in the blood. for faster diffusion you need:a large surface area (lungs have million of alveoli which are air filled s...

Blood glucose levels are controlled by the pancreatic release of the hormone insulin. Insulin is released from the pancreas when blood glucose concentration is high. This causes glucose to move from the b...

DNA is replicated in a semi-conservative manner, which means that both 'parental strands' are used as templates. This ensures that genetic information is passed onto offspring without any changes
(di...