The Nervous System at the Cellular Level

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Abstract
Perfusion experiments of the squid giant axon cell membrane were performed and the ion distribution and their shift were discussed. The paper also reviews the tetrodotoxin effect of blocking the Na+-carrier mechanism in the squid, and the effects of acetylcholine (ACh) and gamma-amino-butyric acid (GABA) on conduction at synaptic membranes of arthropods, molluscs, and mammals. The ''quantum hypothesis'' of transmitter release in the frog by del Castillo and Katz, and experiments dealing with facilitation at neuronuscular junctions and posttetanic potentiation (PTP), presynaptic interaction in Aplysia, inhibition, electric transmission, and electronic junctions of frogs and chicks are described.

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