GENERAL ANATOMY
ENDOCRINE SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The chemical signal
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Has receptor
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Accepts and temporairly joins with ligand, forms receptor/ ligand complex
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Releases the signal
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Detailed explanation-1: -A target cell responds to a hormone because it bears receptors for the hormone. In other words, a particular cell is a target cell for a hormone if it contains functional receptors for that hormone, and cells which do not have such a receptor cannot be influenced directly by that hormone.
Detailed explanation-2: -All classes of hormones elicit the majority of their physiological effects via specific receptors which are located in three separate compartments of target cells: cell membranes (peptide and glycopeptide hormones), cytoplasm (steroid hormones) and nucleus (thyroid and steroid hormones).
Detailed explanation-3: -For instance, steroid hormones, like the sex hormone groups estrogens and androgens, seek out specific target cells and bind to receptor proteins located inside the nucleus of the cell, as shown below.
Detailed explanation-4: -Adrenergic receptor. Olfactory receptors. Receptor tyrosine kinases. Epidermal growth factor receptor. Insulin Receptor. Fibroblast growth factor receptors, High affinity neurotrophin receptors. Ephrin receptors. More items