Otto Loewi electrically stimulated a nerve in a frog heart. He then applied fluid surrounding that heart to a second heart. In this experiment, he found evidence that
A) neurons communicate chemically.
B) neurons communicate electrically.
C) the speed of neural transmission differs across species.
D) his theory of saltatory conduction was correct.

Question

Quizplus · Accepted Answer

Loewi's experiment demonstrated chemical communication between neurons, specifically the release and diffusion of the neurotransmitter acetylcholine from the stimulated nerve to the fluid surrounding the first heart, which then affected the second heart when that fluid was applied to it.

Otto Loewi Electrically Stimulated a Nerve in a Frog Heart