1. (6 pts) Consider otto Loewi\'s frog heart experiment. Recall that stimulation
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1. (6 pts) Consider otto Loewi's frog heart experiment. Recall that stimulation of the vagus nerve causes a frog's heart to release the neurotransmitter acetylcholine, which slows the heartbeat. Hamiton Tinmas The Loewi Experiment ST MULAN OR PUMP X, VAGUS NERVE Heart 1 Heart 2 What will happen to the heartbeat of heart 2 under each of the following conditions? (ie, slow down, speed up, no change) a. Acetylcholine added directly to heart 2. b. Stimulation of heart 1 (with the pump turned on). c. Stimulation of heart 1 while turning off the pump. 2. (3 pts) What conclusion did Loewi draw from this experiment about the nature of neuronal communication (one sentence)?Explanation / Answer
Communication of information between neurons is accomplished by movement of chemicals across a small gap called the synapse. Chemicals, called neurotransmitters
Condition a: If Acetylcholine is added directly to heart 2, then the muscles of the "heart 2" will tend to relax due to the dilation of blood vessels also known as vasodilation. But it won't effect the "heart 1" as the motion of the pump is unidirectional causing NO CHANGE.
Condition b: when stimulation was given to "X" i.e the vagus nerve then "Heart 1" tends to Slow down and releases a fluid into the chamber i.e Acetylcholine and which gradually travels to "Heart 2" and tends to Slow it down also.
Condition c: NO CHANGE will occur as the connectivity between the hearts is through the pump only.
2. Communication between the gaps of neurons known as synapse take place with the help of chemicals known as neurotransmitters.
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