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A decrease in parasympathetic discharge to the heart leads to
A. a decrease in the conductance of F-channels in SA node cells.
B. an increase in the conductance of potassium channels associated with muscarinic ACh receptors in SA node cells.
C. an increase in the amount of ACh (acetylcholine) released near SA node cells of the heart.
Problem of Polarity The control of polarity in regenerating coelentrates like hydra has received much attention for many years. You are already aware that while a hydra is cu
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