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Exam+2+--+Winter+2007+_Practice_+--+Blank

Exam+2+--+Winter+2007+_Practice_+--+Blank - Practice Exam 2...

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Practice Exam 2 Bio 225 Winter 2007 1. Parathyroid hormone (PTH) increases blood plasma calcium levels by: a. Inhibiting reabsorption of Ca++ in the kidney b. Directly stimulating Ca++ absorption in the intestines c. Increasing osteoblast activity d. Increasing osteoclast activity e. a, b & c f. a, b & d 2. Rickets is often a result of a deficiency of Vitamin D in the diet. This is an example of: a. Hypercalcemia, because the intestines do not absorb Ca++ into the bloodsteam. b. Hypocalcemia, because the intestines do not absorb Ca++ into the bloodsteam. c. Hypercalcemia, because the kidneys reabsorb high levels of Ca++ in the absence of Vitamin D. d. Hypocalcemia, because the cannot reabsorb Ca++ in the absence of vitamin D. 3. Catecholamines and Corticosteroids are both released in response to stress. The difference between them is: 4. The following is true about Cushing’s Syndrome: 5. In an individual with Androgen insensitivity syndrome, the external genitalia develop as female because:
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6. Relsease of GnRH from the hypothalamus is responsible for: a. Causing release of FSH from the anterior pituitary, resulting in stimulation of Sertoli cells b. Causing release of LH from the anterior pituitary, resulting in stimulation of Sertoli cells c. Causing release of LH from the anterior pituitary, resulting in stimulation of Leydig cells d. Directly stimulating the sertoli cells. e. a & b f. a & c
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