PATHOLOGY MCQ
ENDOCRINE SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Yes, they affect all cells
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No, the cell has to have a matching receptor
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Maybe
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Depends on the situation
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Detailed explanation-1: -Action Hormones are carried by the blood throughout the entire body, yet they affect only certain cells. The specific cells that respond to a given hormone have receptor sites for that hormone. This is sort of a lock-and-key mechanism.
Detailed explanation-2: -Once released, hormones travel throughout the body looking for target cells that contain matching receptors. The hormone binds with the receptor, something like how a key fits a lock to unlock a door. Hormones, like keys, need to have a compatible receptor, or lock, in order to work.
Detailed explanation-3: -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.