Cardiac Cycle

1. Cardiac Cycle This quiz will require you to apply concepts from the cardiac cycle and control of blood flow. Click here to see the instructions

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4. After blood enters the right atrium, it goes through the: Bicuspid valve Tricuspid valve Inferior vena cava Pulmonary trunk Mitral valve Coronary arteries

5. The left atrium receives blood from the: Right atrium Superior vena cava Left ventricle Lungs Hepatic portal vein Systemic arteries

6. The bicuspid valve is between: Left atrium and right atrium Right atrium and Right ventricle Left atrium and Left ventricle Pulmonary veins and Left atrium Left atrium and Right ventricle Superior vena cava and Left atrium

7. The pulmonary circuit runs from the: Pulmonary vein to aorta Left ventricle to Cerebral arteries Right atrium to Pulmonary semilunar valve Right atrium to Iliac artery Left atrium to left ventricle Pulmonary trunk to the Left atrium

8. In the pulmonary circuit, you find the blood with the least Oxygen in the: Pulmonary veins Pulmonary capillaries Pulmonary arteries Left atrium Pulmonary venules Inferior vena cava

9. Red blood cells in pulmonary capillaries: Pick up O2, Drop off CO2 Drop off O2, Drop off CO2 Pick up CO2, Drop off O2 Divide to form reticulocytes Pick up O2, Pick up CO2 Secrete erythropoietin

10. Systole happens when: Atria contract Ventricles contract Semilunar valves close The heart is filling with blood AV valves open The heart is relaxing

11. During diastole: The heart is relaxed The ventricles contract Blood flows into the aorta Blood flows though The semilunar valves The AV valves are closed The semilunar valves Are open

12. The ‘pacemaker’ cells that start a heart beat are in: The atrial septum The interventricular septum The left ventricle The superior vena cava The right atrium The papillary muscles

13. The pacemaker is called: The node of Ranvier The AV node The semilunar valve The SA node The papillary muscle The chordae tendinae

14. The cells in the SA node fire because: A neurotransmitter attaches to them The cells next to them have fired They receive an electrical impulse Their acetylcholine receptors are stimulated Ca2+ leaks into the cells The SNS is activated

15. When cardiac muscle cells have depolarized, they: Open their Na+ channels Remain depolarized for a while Close K+ channels Repolarize Close Ca2+ channels Remain at resting potential

16. The P wave indicates: Ventricular repolarization Atrial depolarization Ventricular depolarization Atrial repolarization Atrial hyperpolarization Ventricular hypopolarization

17. The T wave indicates: Ventricles relaxing Atria depolarizing Atria contracting Atria repolarizing Ventricles contracting Ventricles repolarizing

18. If the Bundle of His is damaged, you see: A shortened PR interval Multiple rapid P waves A widened QRS complex No QRS complexes High, pointed T waves A prolonged PR interval

19. The first heart sound is caused when: Ventricles relax AV valves close Semilunar valves close Ventricles repolarize ANF is secreted The heart is empty

20. If the semilunar valves didn’t close properly, you would hear: No heart sounds A murmur in the carotids A murmur during systole A murmur throughout the heartbeat No first heart sound A murmur during diastole

21. If heart rate increases, Cardiac Output will: Depend on peripheral resistance Increase Depend on blood pressure Not be affected Decrease and then increase Decrease

22. Peripheral Resistance is: The amount of blood pumped out of the heart in one minute How hard it is to push blood through the blood vessels The pressure blood exerts against the walls of the arteries A person’s ability to maintain blood pressure when conditions change How high blood would rise in a cannula inserted into the artery the amount of blood entering a tissue divided by the number of capillaries

23. If Blood Pressure goes down: Low BP will cause low PR The body can fix it by lowering PR CO will decrease PR and CO will both decrease The body can raise it by increasing CO The body will activate the PNS

24. To increase peripheral resistance: Vasoconstrict arterioles Vasodilate capillaries Vasoconstrict capillaries Increase blood pressure Vasodilate arterioles Increase heart rate

25. When blood volume increases: SV increases PR increases CO decreases BP decreases PR decreases HR increases