Cardiovascular System Physiology Set 1

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Physiology (Cardio-Vascular System) 1

MCQ

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1. Propagation of the action potential through the heart is
fastest in the :

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2. The action potential of cardiac muscle differs from that
of skeletal muscles in:

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3. The left vent . has a thicker wall than the right ventricle because :

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4. It is impossible to tetanize a heart because :

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5. Under normal conditions , the capillaries :

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6. In the heart all the following are true except :

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7. The main function of the cardiac purkinje system is to :

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8. The cardiac tissue with the slowest rhythmicity is the :

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9. About the cardiac conductivity, all the following are true except :

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10. The cardiac muscle fibers :

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11. The absolute refractory period in the ventricle :

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12. All the following are correct except

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13. The fibers of the A-V bundle & its branches :

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14. In the heart , all the following are true except :

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15. When the bundle of His is completely interrupted ,the :

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16. The atrio-ventricular valves :

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17. Regarding the S-A node :

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18. The action potential of the cardiac muscle is characterized by
the presence of plateau which :

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19. About the cardiac muscle all the following are true except :

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20. About the purkinje tissue ,all the following are true except :

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21. The S.A node :

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22. About the pacemaker potential, all the following are true except :

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23. The cardiac muscle is characterized by having all the following
except :

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24. The SA node is the normal pacemaker because of its :

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25. Myocardial contractility is best correlated with the
intracellular concentration of :

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