In an electron-microscope study of the developing rabbit adrenal gland numerous gap junctions and desmosomes were identified between the cortical cells, particularly in the juxtamedullary cortical tissue. An electrophysiological examination of the cortical cells showed them to be electrotonically coupled. Such couplings were more frequently found in the juxtamedullary cortical tissue than in the outer cortex.
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Joseph et al. (1973) studied this question.
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