Development of Excitability in Embryonic Muscle Cell Membranes in Certain Tunicates

Science  29 Jan 1971:
Vol. 171, Issue 3969, pp. 415-417
DOI: 10.1126/science.171.3969.415


During the course of development of muscle cells in certain tunicates, a sign of regenerative membrane response appears in the gastrula stage. In the early tadpole larva, the action potential consists of a spike followed by a plateau. The latter-disappears in fully differentiated cells, conceivably in association with the establishment of delayed rectification.