Ex1Fall09KEY - Examination I VPHY 3100 Elements of...

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Examination I VPHY 3100 Elements of Physiology September 14th, 2009 1:25 - 2:15 p.m. Multiple Choice (2.5 points each) FOR EACH QUESTION, CHOOSE THE SINGLE BEST ANSWER. 1. Which of the following is not part of a cell? A. the nucleus B. the endoplasmic reticulum C. the extracellular fluid D. the plasma membrane E. the cytoplasm 2. _________________ are the major thermodynamic impediment to the movement of most molecules and ions through the plasma membrane of a cell. A. Integral membrane proteins B. Glycoproteins C. The polar head groups of phospholipids D. The hydrocarbon chains of phospholipids E. Membrane transport proteins 3. The solvent in biological systems is: A. water. B. oxygen. C. salt. D. glucose. E. blood. 4. Consider a tank partitioned into equal volumetric halves by a membrane that is permeable to both glucose and water. Initially, the right-hand compartment contains a 0.5 M aqueous solution of glucose and the left-hand compartment contains a 0.3 M aqueous solution of glucose. At what point will equilibrium be reached? A. When the concentration of water on each side of the membrane is equal. B. When the concentration of glucose is 0.4 M on each side of the membrane. C. Equilibrium will not be reached because glucose is not osmotically active. D. Both (A) and (B) are true. E. None of the above are true. 5. In Question #4 above, and prior to equilibrium, there is net diffusion of: A. water from the right-hand compartment to the left-hand compartment. B. glucose from the right-hand compartment to the left-hand compartment. C. glucose from the left-hand compartment to the right-hand compartment. D. both (A) and (B) are true. E. both (A) and (C) are true. 6. Which of the following solutions would exert the greatest osmotic pressure? A. 50 molal MgCl 2 B. 100 molal fructose C. 100 molal KCl D. 50 molal glucose and 50 molal KCl 1
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E. 50 molal glucose and 50 molal fructose 7. How many grams of MgCl 2 (molecular weight 95 g/mol) must be added to water, up to a total volume of 0.5 liters, in order to create a solution that is 0.3 M MgCl 2 ? A. 158 grams MgCl 2 B. 57 grams MgCl 2 C. 14 grams MgCl 2 D. 0.02 grams MgCl 2 E. 0.002 grams MgCl 2 8. Which of the following membrane transport proteins mediates facilitated diffusion? A. the sodium pump B. the glucose uniporter C. the sodium/calcium exchanger D. the sodium/glucose cotransporter E. the calcium pump 9. Which of the following would you predict to move solute the fastest across a cell membrane? A. voltage-gated K + channel B Na + /K + -ATPase C. Ca 2+ -ATPase D. glucose uniporter E. Na + /glucose cotransporter 10. Which of the following statements is true regarding potassium ions and a “typical” eukaryotic cell? A.
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This note was uploaded on 01/17/2010 for the course VPHY 3100 taught by Professor W during the Spring '05 term at University of Georgia Athens.

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Ex1Fall09KEY - Examination I VPHY 3100 Elements of...

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