CONNECTIVE TISSUE GLAND
ENDOCRINE
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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: -Cells that have receptors for a particular hormone are called target cells.
Detailed explanation-3: -Target cells are cells that are receptive to a secreted hormone. dependent on three factors; the hormone levels in the blood, the receptor levels on the target cell, and hormone–receptor affinity.
Detailed explanation-4: -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-5: -Control of target cell hormones Target cell sensitivity to a certain hormone is partly based on the amount of receptors for that hormone that the target cell has. The more receptors, the higher the target cell’s sensitivity. Hormone receptors are continuously broken down and replaced.