If the Membranes of the Cardiac Muscle Cells in the SA

question 98

Multiple Choice

If the membranes of the cardiac muscle cells in the SA node become more permeable to potassium ions,

• A) the heart rate will increase.
• B) the heart rate will decrease.
• C) the membrane will depolarize.
• D) the stroke volume will increase.
• E) the intracellular concentration of calcium ion will increase.

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