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Question
Which of the following is NOT true about a chemical functioning in physiological regulation
A. There must be a mechanism to turn off the chemical's action.
B. The chemicals must be secreted by endocrine glands.
C. Target cell must have specific receptor molecules for the chemical.
D. The combination of the chemical and its receptor must cause specific changes to occur in the target cell.
Answer
This answer is hidden. It contains 1 characters.
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