If the Length of the Absolute Refractory Period in Cardiac

question 71

Multiple Choice

If the length of the absolute refractory period in cardiac muscle cells was the same as it is for skeletal muscle cells,__________ .

• A) tetanic contractions might occur, which would stop the heart's pumping action
• B) contractions would last as long as the refractory period
• C) pacemaker cells would cease to spontaneously depolarize
• D) it would be much longer before cardiac cells could respond to a second stimulation

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