Chem Ch 19 Review Questions

1. Open-loop negative feedback refers to the phenomenon of:a. Negative feedback with a modifiable set point*b. Blood flow in the hypothalamic-hypophysial portal systemc. Blood flow to the pituitary via Dural-penetrating vesselsd. Negative feedback involving an unraveling, fixed set point

2. The specific feedback effector for the FSH is:a. Activinb. Inhibin*c. Progesteroned. Estradiol

3. Which anterior pituitary hormone lacks a stimulatory hypophysiotropic hormone?a. Growth hormoneb. Prolactin*c. Vasopressind. ACTH

4. The definitive suppression test to prove any autonomous production of growth hormone isa. Somatostatin infusionb. Estrogen primingc. Dexamethasone suppressiond. Oral glucose loading*

5. Which of the following are influenced by growth hormone?a. IGF-1b. IGFBP-IIIc. Lipolysisd. All of the above*

6. What statement concerning vasopressin secretion is truea. Vasopressin secretion is closely tied to plasma osmolalityb. Changes in blood volume also alter vasopressin secretionc. A reduction in effective blood volume overrides the effects of plasma osmolality in

regulating vasopressin secretiond. All of the above*

7. What are the long term sequelae of untreated or partially treated acromegaly?a. An increased risk of colon and lung cancer*b. A reduced risk of heart diseasec. Enhanced longevityd. Increased muscle strength

8. Thyrotropin-releasseing hormone TRH stimulates the secretion ofa. Prolactinb. Growth hormonec. TSHd. Both A and C*

9. Estrogen influences the secretion of which of the following hormone?

Chem Ch 19 Review Questions

a. Growth hormoneb. Prolactinc. Luteinizing hormoned. All of the above*