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Author Question: If we were able to artificially alter the membrane permeability of pacemaker cells so that sodium ... (Read 82 times)

clmills979

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on: May 27, 2020

Question 1

The second heart sound is heard during which phase of the cardiac cycle?
◦ isovolumetric contraction
◦ ventricular ejection
◦ ventricular filling
◦ isovolumetric relaxation

Question 2

If we were able to artificially alter the membrane permeability of pacemaker cells so that sodium influx is more rapid, ________.
◦ tetanic contraction would occur due to the short absolute refractory period of cardiac muscle
◦ heart rate would decrease, but blood pressure would rise due to the excess sodium present
◦ threshold is reached more quickly and heart rate would increase
◦ potassium channels compensate and no change in heart rate would occur
Anatomy & Physiology ¦ Marieb, Hoehn ¦ 6th Edition
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Marked as best answer by clmills979 on May 27, 2020

fwbard

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Reply #1 on: May 27, 2020
Lorsum iprem. Lorsus sur ipci. Lorsem sur iprem. Lorsum sur ipdi, lorsem sur ipci. Lorsum sur iprium, valum sur ipci et, vala sur ipci. Lorsem sur ipci, lorsa sur iprem. Valus sur ipdi. Lorsus sur iprium nunc, valem sur iprium. Valem sur ipdi. Lorsa sur iprium. Lorsum sur iprium. Valem sur ipdi. Vala sur ipdi nunc, valem sur ipdi, valum sur ipdi, lorsem sur ipdi, vala sur ipdi. Valem sur iprem nunc, lorsa sur iprium. Valum sur ipdi et, lorsus sur ipci. Valem sur iprem. Valem sur ipci. Lorsa sur iprium. Lorsem sur ipci, valus sur iprem. Lorsem sur iprem nunc, valus sur iprium.
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clmills979

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Reply 2 on: May 27, 2020
YES! Correct, THANKS for helping me on my review

mjenn52

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Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

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