1. Hormones:
A. are released into the interstitium.
B. require target cell receptors to illicit a target cell response.
C. are always proteins.
D. All of the above are correct.
E. Only A and B are correct.
2. Lipophilic hormones:
A. enter the target cell by simple diffusion.
B. bind to a cell-membrane receptor on the target cell membrane.
C. are only released from exocrine glands.
D. require no target-cell receptors (extracellular or intracellular).
E. None of the above is correct.
3. Hydrophilic (amino-acid based) hormones:
A. bind to cell-membrane receptors on the target cells.
B. always increase the production of cyclic AMP.
C. aways inhibit the production of cyclic AMP.
D. All of the above are correct.
E. None of the above is correct.
4. Insulin is released when the plasma [glucose] ___________; glucagon is released when the plasma [glucose] _______________.
a. Increases: Decreases
b. Decreases: Increases
5. For the most part, hormone concentrations are controlled through:
A. positive feedback cycles.
B. negative feedback cycles.
C. homeostatic regression.
D. therostatic coupling.
E. None of the above is correct.