Quiz 4 3100 F08- - BMED 3100 Systems Physiology Quiz 4 Honor Pledge All students are required when requested to attach the following statement to

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BMED 3100 Systems Physiology Quiz 4, 10/27/08 1 Honor Pledge All students are required, when requested, to attach the following statement to any material turned in for a grade in any course at Georgia Institute of Technology: On my honor, I pledge that I have neither given nor received inappropriate aid in the preparation of this assignment. KEY ___________________________ Signature __________________________________ Name (Printed) Be brief in your answers. Write clearly. Backs of pages will not be graded.
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BMED 3100 Systems Physiology Quiz 4, 10/27/08 1 Multiple choice (there is only one correct answer). Write your answer on the line (2 pts each) 1. Which of the following statements concerning the differences between action ___ C _ potentials in skeletal-muscle cells and in ventricular cardiac muscle cells is true? a. Like skeletal-muscle cells, ventricular cardiac-muscle cells have a resting membrane potential closer to the sodium equilibrium potential than to the potassium equilibrium potential. b. Unlike skeletal-muscle cells, the initial depolarization of ventricular cells is mainly due to calcium influx, not sodium influx. c. After sodium influx through fast channels occurs in ventricular cells, an influx of calcium occurs. No such calcium influx occurs after sodium influx in the skeletal-muscle cells. d. Action potentials in skeletal-muscle cells are longer in duration than action potentials in cardiac cells. e. All of the choices are true. 2. An ECG would be useful for determining a patient's ____ D ____ a. heart murmur. b. stroke volume. c. cardiac output. d. blockage of conduction of electrical signals between the atria and the ventricles. e. None of the choices are correct. 3. The aortic valve _____ B _____ a. prevents the backflow of blood into the aorta during ventricular diastole. b. prevents the backflow of blood into the left ventricle during ventricular diastole. c. prevents the backflow of blood into the left ventricle during ventricular ejection. d. prevents the backflow of blood into the aorta during ventricular ejection. e. closes when the first heart sound is heard. 4. The heart valves open and close due to _____ B ____ a. stimulation by the sympathetic and parasympathetic nerves. b. a pressure difference on the two sides of the valve. c. Na + and K + fluxes during ventricular depolarization. d. turbulent flow in the atria and ventricles. e. None of the choices are correct. 5. Which of the following statements concerning the capillaries is false? ____ A _____ a. Increasing capillary hydrostatic pressure decreases the likelihood that filtration will occur. b.
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This note was uploaded on 01/12/2012 for the course BMED 3110 taught by Professor Staff during the Spring '08 term at Georgia Institute of Technology.

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Quiz 4 3100 F08- - BMED 3100 Systems Physiology Quiz 4 Honor Pledge All students are required when requested to attach the following statement to

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