In a classic experiment, Otto Loewi stimulated the vagus nerve of a frog heart electrically. He let the fluid bathing the heart he was stimulating flow to and thus contact a second, nonstimulated heart. Both the first and second hearts slowed down with this stimulation. Based on this response, you can assume the nerve he stimulated was part of the
A. parasympathetic system.
B. sympathetic system.
C. somatic system.
D. atrioventricular system.
E. central nervous system.
A. parasympathetic system.
Biology & Microbiology
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