Loewi demonstrated that synapses operate by the release of chemicals. He did this by:
A) applying adrenaline directly to the heart muscle.
B) collecting fluid from a stimulated frog's heart, transferring it to another frog's heart, and measuring that heart rate.
C) measuring the speed of a dog's reflexes while the dog was under the influence of various drugs.
D) applying an extract of marijuana in eye drops and discovering that it dilated the pupils.

Question

Quizplus · Accepted Answer

Loewi's experiment involved collecting fluid from a stimulated frog's heart, transferring it to another frog's heart, and measuring that heart rate. This demonstrated that chemicals released at the synapse were responsible for communication between neurons.

Loewi Demonstrated That Synapses Operate by the Release of Chemicals