The hormones known as “catecholamines” (adrenaline, noradrenaline and dopamine) are not lipid soluble. Therefore their receptor sites are:
belongs to book: Examination Questions and Answers in Basic Anatomy and Physiology|Martin Caon|| Chapter number:10| Question number:91
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B: With the receptors on the outside of the membrane, catecholamines do not need to be able to penetrate the membrane.
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