6. When looking at the PORST ofthe ECG, which letter represents the first heart

Question

6. When looking at the PORST ofthe ECG, which letter represents the first heart sound, which is the opening of the semilunar valves? B. Q C. R D. T 7. In the scenario that the atria are flled with blood and ready to empty. what is the status or positions of the valves? A AV valves open, Semilunar valves closed B. O semilunar valves are open, AV valves are closed C. O all valves are closed D. all valves open 8. Normal boundaries of the heart are influenced by... A age, body build, state of contraction of the heart B. age, body build, state of contraction of the heart, gender C. state of contraction of the heart, gender D, age, body build, gender E. evervone's is the same size

Explanation / Answer

Ans 6. First heart sound is produced at the beginning of systole when the atrioventricular (AV) valves close and the semilunar (SL; the aortic and pulmonary) valves open. This sound commonly termed the 'lub' sound of the heartbeat. This Coincide with R wave of ECG.

Ans 7. When the atria are filled with blood and ready to empty then AV valves open and semilunar closed.

Ans 8. Normal boundaries of heart influenced by age, body build, the state of contraction of heart and gender.

Ans 9. Tricuspid valve - right AV valve

  Mitral valve - left AV valve.

Ans 10. Another name for the bicuspid valve is Mitral AV valve or Mitral atrioventricular valve.

Ans 11. The function of a lymph node is to filter and clean the lymph.

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