For this question, use the standard letters (PQRST) to indicate points, and the

Question

For this question, use the standard letters (PQRST) to indicate points, and the letters for beginning and ending points (such as PR) to indicate segments. (½ each)

A.        At what point on the ECG do ventricular cells drop from +30 to -70 mV?

                       

B.        During what segment of the ECG should the right atrium be in the process of contracting?

C.        At what point on the ECG is the AP being passed through gap junctions in the atria?

D.        During what segment of the ECG should the left semilunar valve be open with blood moving through it?

E.         At what point in the ECG is the AP passing along the Bundle of His?

F.         During what segment of the ECG is the entire heart at rest?

1. For this question, use the standard letters (PQRST) to indicate points, and the letters for beginning and ending points (such as PR) to indicate segments. (½ each) A. A hat point on the ECG v B. During what segment of the ECG should the right atrium be in the process of o ventricular cells drop Irom contracting? At what point on the ECG is the AP being passed through gap junctions in the atria? During what segment of the ECG should the left semilunar valve be open with blood C. D. moving through it? At what point in the ECG is the AP passing along the Bundle of His? During what segment of the ECG is the entire heart at rest? E. F.

Explanation / Answer

A. At " point S".

B. PR segment.

C.point P

D. ST segment

E. PR segment.

F . ST segment.

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