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Practice%20Exam%204%20v2 - BISC 220 Spring 2010 Exam 4 v2...

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Page 1 of 4 BISC 220, Spring 2010, Exam 4 v2 Albert Herrera 1. In the absence of both vasopressin and aldosterone, the greatest fraction of water filtered into kidney tubules is reabsorbed in the … a. loops of Henle. d. cortical (upper) collecting ducts. b. proximal tubules. e. medullary (lower) collecting ducts. c. distal tubules. 2. Which one of the following statements is false ? 3. What is the significance of the fact that the ascending limb of the loop of Henle is impermeable to water but actively transports Na + and Cl - ions out of the tubular fluid? 4. For 4 of the 5 hormones in the following list, the primary target organ is another endocrine organ. For which one of these hormones is the primary target not an endocrine organ? 5. Kallman’s syndrome is a disorder in which GnRH-releasing neurons do not migrate to the hypothalamus and develop normally. Which one of the following would not be expected in a patient with untreated Kallman’s syndrome? a. infertility d. rare and irregular ovulatory cycles in women b. low desire for sex e. feminization of male secondary sex characteristics c. high sperm counts in men
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