Systems Phys Exam 1-spring 2004

Systems Phys Exam 1-spring 2004 - 1 Systems Physiology 1st...

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Systems Physiology 1 st Hour Exam February 19, 2004 Name________________________ Student ID #_____________________ Form B Section _____ (01 not Pharmacy or 02 Pharmacy) PRINT CLEARLY on your Scantron Answer sheet: Your Name, Student ID #, Form (A or B), and Section (01 or 02) Multiple Choice Questions: Choose only the one best answer for each question (50 pts total) 1. During the _______ (phase) of the nerve action potential, the membrane is in a state of ________. A. rising; high K + permeability B. falling; high Na + permeability C. after hyperpolarization; high K + permeability D. recovery; high Na + permeability 2. In a _______ feedback control system, a change in a physiological variable (such as temperature, oxygen level, etc.) produces a response that restores the variable to its original condition. A. equilibrium B. negative C. positive D. saturated 3. Stimulation of pain receptors in the right foot leads to ________ of ________ motor neurons that innervate the right foot and _______ of ________ motor neurons that innervate the left foot. A. inhibition; flexor; inhibition; extensor B. excitation; flexor; excitation; extensor C. inhibition; flexor; excitation; extensor D. excitation; flexor; inhibition; extensor E. excitation; extensor; excitation; flexor 4. ______________ form(s) the principal barrier that prevents charged molecules from entering a cell. A. The lipid bilayer B. Hydrophobic proteins C. Membrane pores D. Hydrophilic proteins 5. At a “metabotropic” synapse, the receptor site for the neurotransmitter is part of a (an) _________. A. G protein B. membrane channel forming protein C. independent membrane receptor protein D. 2 nd messenger producing enzyme E. phosphatase 1
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6. _______ summation requires the _______ activity of the presynaptic neuron(s) terminating on the postsynaptic neuron. A. Spatial; simultaneous B. Temporal; repetitive C. Both of the above are correct D. Neither of the above is correct 7. The binding of Ca ++ to _______ initiates muscle contraction by removing _______ blockage of _______ formation. A. tropomyosin; troponin; cross-bridge B. tropomyosin; actomyosin; cross-bridge C. troponin actomyosin; cross-bridge D. troponin; tropomyosin; actomyosin 8. Most parasympathetic neurons release __________________ as their neurotransmitter. A. norepinephrine B. epinephrine C. acetylcholine D. both A and B E. all of the above 9. The rising phase of an action potential is primarily the result of _______ voltage activated _______ channels. A. opening; Na + B. closing; K + C. closing; Na + D. opening; K + 10. Arrange the following processes in the order in which they occur during synaptic transmission at the motor endplate synapse between a motor neuron and a skeletal muscle fiber: (1) acetylcholine binding to ionotropic receptor; (2) acetylcholine binding to metabotropic receptor; (3) Ca ++ influx; (4) action potential depolarizes presynaptic terminal; (5) exocytotic release of acetylcholine; (6) channels for Na + and K
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This note was uploaded on 04/12/2008 for the course SYS 146:356 taught by Professor John-alder during the Spring '08 term at Rutgers.

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Systems Phys Exam 1-spring 2004 - 1 Systems Physiology 1st...

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