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Answers to Practice Questions for Ch 16

Answers to Practice Questions for Ch 16 - Chapter 16 The...

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Chapter 16 The  Endocrine System 1. A major difference between neurotransmitters and hormones is that hormones are  secreted ____________. a. directly onto their target cell b. into the cerebrospinal fluid c. into ducts d. into the blood 2. A major determinant of a hormone’s mechanism of action is __________. a. whether the hormonal molecule is hydrophobic or hydrophilic b. large or small c. rapid-acting or slow-acting d. activates gene activity 3. Receptors for steroid hormones are commonly located _________. 4. Interaction with a membrane-bound receptor will transduce the hormonal message via  __________. 5. Treatment of a hormone’s target cell with a phosphodiesterase inhibitor will result in  ________. 6. Second messenger-activating hormones circulate in minute quantities because a. they are not important signal molecules. b. small amounts of hormone can activate huge amounts of intracellular  signals (amplification).
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