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1- The drug has a similar shape to the substrate which is complementary to the active site of the electron transport chain proteins. 2- Competitive inhibition stops the transfer of electrons, coming from ...

The heart follows a cycle of contraction (systole) and relaxation (diastole), like this:

whole heart diastole --> atria systole --> ventricular systole --> atria diastole, ventricular syst...

There are 3 hormones mentioned in the AQA GCSE Biology specification. These are FSH (follicle stimulating hormone), LH (leuteinising hormone), and oestrogen. FSH and LH are produced by the pituitary gland...

Raised plasma glucose concentration means greater entrance of glucose into beta cells in the Islet of Langerhans in the pancreas. This increased concentration glucose means greater metabolism of glucose, ...

A reflex action occurs very quickly, and does not involve the brain. The stimulus (e.g. a flame) is sensed by the receptor (the skin). The sensory neurone attached to the receptor sends an impulse to the ...