When vagus nerve stimulation was applied to the frog heart, .
a) the force of contraction increased and the heart rate slowed and eventually stopped
b) the force of contraction decreased the force of contraction decreased and the heart rate slowed and eventually stopped
c) the heart rate slowed and eventually stopped
d) the force of contraction increased
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When vagus nerve stimulation was applied to the frog heart, .
a) the force of contraction inc...
a) the force of contraction inc...
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