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Midterm

F2009 Term test 1.doc

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Department
Biology
Course
BIO310H5
Professor
Angela B Lange
Semester
Winter

Description
NAME _________________________________ STUDENT NUMBER _____________________ BIO310 TERM TEST 1 October 6, 2009 ANSWER IN THE SPACE PROVIDED RETURN THE ANSWER SHEET AND THE QUESTIONS TO THE INVIGILATOR WHEN COMPLETED PART A _____________/ 19 PART B ______________/ 19 1) Compare and contrast how the autonomic nervous system exerts homeostatic control over the pupil and blood vessels. [4 marks] 2) A drug completely blocks the conversion of the thyroid hormones T to T Using 4 3. your understanding of thyroid hormone regulation, explain the effect of this drug on A) TSH levels and B) thyroxine secretion. It is not necessary to explain thyroid hormone production [6 marks] 3) Some cancers secrete excessive amounts of a protein (parathyroid hormone- related protein) that acts like parathyroid hormone. a. Explain the normal role of parathyroid hormone in the body, including the mechanism that controls PTH secretion [7 marks] b. Explain why a person with such a cancer might be at increased risk for bone fracture [2 marks] MULTIPLE CHOICE - SELECT BEST ANSWER - ANSWER ON SCANTRON 1. You discover a new hormone molecule that you think is important for the homeostatic regulation of zinc through negative feedback. If you are correct then which of the following might be true: A. a decrease in the amount of zinc increases the amount hormone produced. B. an increase in zinc reduces the amount of hormone produced. C. a decrease in zinc reduces the amount of hormone produced. D. A and B E. A, B and C 2. Carbohydrates are predominantly stored in the body as: A. glycogen in the liver B. glucose in the muscle C. triglycerides in fat D. A and B E. A, B and C 3. Calcium is thought to act as a trigger for vesicle fusion by interacting with which protein? A. SNAP-25 B. Synaptotagmin C. Syntaxin D. VAMP 4. Glucose uptake into several tissues is regulated by insulin secretion from the β-cells of the pancreas. This is an example of A. endocrine control. B. exocrine control. C. paracrine control. D. none of the choices are correct. E. all of the choices are correct. 5. If exercising muscles do not receive sufficient oxygen, you expect there to be an increase blood concentration of: A. pyruvic acid B. glucose C. lactic acid D. ATP 6. With respect to the number of ATP molecules directly produced, the major energy- converting process in the cell is: A. glycolysis B. krebs cycle C. oxidative phosphorylation D. gluconeogenesis 7. Comparing the major fuel sources used by cells, the greatest yield of ATP is from: A. two molecules of glucose B.
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