(a)
Interpretation:
Chemical formula of given antihistamine has to be written.
Concept Introduction:
Chemical formula is a representation of a compound by showing number of each element presented in it.
(b)
Interpretation:
Similarities between histamine and given antihistamine has to be given that allows the given antihistamine to compete with histamine.
Concept Introduction:
Drugs: Drugs are molecules which are taken from an external source to change the normal functioning of the body. The action of drug is in molecular level and the design of many drugs are in such a way that it mimics a particular neurotransmitter or hormone. Drugs bind with receptors showing an increased or decreased effect.
Receptors: Receptors is a molecule or a part of molecule which interacts with a neurotransmitter, a hormone or other molecules which are biochemically active so that a response is initiated in a target cell.
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