ENDOCRINE ORGANS AND RESPIRATORY SYSTEM
ENDOCRINE ORGANS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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an increase in A always produces an increase in X.
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an increase in X always produces a decrease in A.
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a decrease in A always produces an increase in X.
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a decrease in X always causes a decrease in A.
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Detailed explanation-1: -Most hormone feedback mechanisms involve negative feedback loops. Negative feedback keeps the concentration of a hormone within a narrow range. But oxytocin regulation involve positive feedback loops. The release of oxytocin feeds back to increase more oxytocin production and release.
Detailed explanation-2: -A cell with membrane-bound proteins that selectively bind a specific hormone is called that hormone’s. target cell.
Detailed explanation-3: -Steroid hormones, because they are lipid-soluble, bind to intracellular receptors in the cell’s cytoplasm or nucleus. Once the steroid hormone has bound to its receptor, the hormone-receptor complex stimulates increased gene expression and therefore increased protein production.
Detailed explanation-4: -The hormones bind to the target receptor that activates the enzymatic activity of the cell to bring about biochemical changes. Transcription of DNA is initiated by the hormone-receptor complex. The mRNA is translated into protein. This protein causes biochemical changes inside the cell.