There are two main types of adrenergic receptors: the α and β- adrenoceptors. noradrenaline shows slight selectivity for the α receptor, whereas isoprenaline shows selectivity for the β ad

There are two main types of adrenergic receptors: the α and β- adrenoceptors. noradrenaline shows slight selectivity for the α receptor, whereas isoprenaline shows selectivity for the β adrenoceptor. adrenaline shows no selectivity and binds equally well to both the α and β-forms of the adrenoceptors. draw the chemical structures for noradrenaline, isoprenaline, and adrenaline. suggest an explanation for these differences in selectivity relative to the binding site of each receptor.