exam 1 - 1 Systems Physiology 1st Hour Exam Name Student ID...

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Systems Physiology 1 st Hour Exam February 16, 2006 Name________________________ Student ID #_____________________ Form A Section _____ (01 not Pharmacy or 02 if Pharmacy) PRINT CLEARLY on your Scantron Answer sheet: Your Name, Student ID #, Form A , and Section (01 or 02) Multiple Choice Questions: Choose only the one best answer for each question (45 pts total) CORRECT ANSWERS ARE BOLDED 1. _______ is the concept that effective cellular and organ function requires that the essential physical and chemical factors in a cell’s environment be maintained at optimal levels, by _______ control A. negative feedback; homeostatic B. homeostasis; positive feedback C. homeostasis; negative feedback D. positive feedback; homeostatic 2. Preganglionic parasympathetic neurons originate A. in the autonomic ganglia B. in the thoracic and lumbar segments of the spinal cord C. in the brain stem and sacral spinal cord segments D. in the dorsal root ganglia of the spinal cord E. on the surface of the innervated visceral organ 3. If you use a drug to inhibit the activity of the Na+/K+ primary active transporter in the membrane of a nerve cell, what changes would you expect to observe in the concentrations of K+ and Na+ within the cell? A. both would increase B. both would decrease C. K+ would increase and Na+ would decrease D. K+ would decrease and Na+ would increase 4. An IPSP may be produced by the opening of ______ channels A. Na+ B. K+ C. Cl- D. both A and B are correct E. both B and C are correct 5. When a muscle undergoes an _______ contraction _______ and (while) _______. A. isotonic; tension increases; length decreases B . isometric; tension increases; length is unchanged C. isometric; tension is unchanged; length decreases D. isotonic; tension is unchanged; length increases 1
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6. Stimulation of a pressure receptor with a brief light pulse from a laser will produce the sensation of _______ A. light flash B. warmth C. pain D. pressure 7. Choose the correct sequence of the events involved in the active transport of Na+ and K+ by the Na+/K+ pump: 1. Na+ binds to channel protein sites; 2. K+ binds to channel protein sites; 3. ATP phosphorylates channel protein; 4. channel protein undergoes conformational change; 5. Na+ released into extracellular fluid; 6. Na+ released into intracellular fluid; 7. K+ released into extracellular fluid; 8. K+ released into intracellular fluid; 9. channel dephosphorylation. A. 1; 3; 4; 6; 2; 9; 4; 7 B. 1; 3; 4; 5; 2; 9; 4; 8 C. 2; 3; 4; 7; 1; 9; 4; 5 D. 2; 3; 4; 8; 1; 9; 4; 6 8. Auditory receptors are excited by sound when the ______ cilia are bent by vibrations of the overlying ______ membrane. A. hair cell; tectorial B. hair cell; cochlear C. auditory nerve; tectorial D. auditory nerve; cochlear 9. According to the local circuit theory, action potential conduction in an unmyelinated axon is the result of positive current produced by ________ spreading forward to _______ the membrane immediately in front of the rising phase of the action potential. A. Na+ influx;
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exam 1 - 1 Systems Physiology 1st Hour Exam Name Student ID...

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