PATHOLOGY MCQ
ENDOCRINE SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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A cell that has receptors for a particular hormone
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A cell that secretes thyroxine
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A cell located in the adrenal glands that helps in the secretion of epinephrine
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All of the above
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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: -The “target” cells for a particular hormone have receptors, either on the cell membrane, or the case of lipid soluble hormones that can pass through the membrane, inside the cell. Only the cells that have the special receptors for that hormone will respond to exposure.