Exam_1_2008solutions - Name:_ BME 365R: Engineering...

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Name:__________________________________________________________________ 1 BME 365R: Engineering Physiology I (Unique Numbers: 14515, 14520, 14525, 14530) Exam 1 October 1 st 2008 Closed book, closed notes, no calculators, no neighbor’s help Please enter your last name, first name and EID in the bubbles! Please write your name in the name field on this page! Please read the questions and possible answers carefully! Please mark the answers on the Scantron sheet with pencil. There are 17 questions for a total of 100 points. 16 questions are to be answered on the Scantron sheet (5 p each). The last question is to be answered on the extra sheet at the end (20 p). Time: 50 minutes Good luck!
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Name:__________________________________________________________________ 2 Problem 1: Functions of epithelia include all of the following EXCEPT A) providing physical protection. B) controlling permeability. C) producing specialized secretions. D) storing energy reserves. E) movement. Answer: D Problem 2: Red blood cells with an internal osmolarity of 300 mOsM are placed in a solution of 300 mOsM urea. Only urea can cross the cell membrane. The solution is: A) Hyposmotic, hypotonic. B) Hyperosmotic, hypotonic. C) Isosmotic, hypotonic. D) Isosmotic, isotonic. E) Hyperosmotic, isotonic. F) Hyperosmotic, hypertonic. Answer: C Problem 3: Cannon’s postulate that “one chemical can have different effects in different tissues” can be demonstrated with insulin because A) insulin binding to liver cells induces different signaling than binding to fat cells. B) insulin can penetrate the plasma membrane and bind to a cytoplasmic receptor in some cells. C) the insulin receptor activates different insulin receptor substrate (IRS) proteins depending on the tissue or organ. D) insulin is modified by enzymes in the extracellular space of some tissues to modify its action. E) A and D. F) A and C.
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Exam_1_2008solutions - Name:_ BME 365R: Engineering...

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