The excitatory response of the adrenal sympathetic nerve to severe hypoxia decreases in aged rats

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Abstract

The age-related changes in the sensitivity of the adrenal sympathetic nerve to hypoxia were investigated in anesthetized young adult (3-4 months old) and aged rats (25-26 months old). Hypoxia with end-tidal O2concentration FETO2) at 6-2% caused excitation of adrenal nerve activity in the young adult and the aged rats. There was a significant decrease in the responses at 3 and 2% FETO2in the aged rats compared to the young adult rats at either peripheral chemoreceptors-intact or -denervated condition. Reduced responsiveness of the central chemoreceptors to severe hypoxia is suggested as a possible factor in the age-related decreases. © 1993.

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Sato, A., & Trzebski, A. (1993). The excitatory response of the adrenal sympathetic nerve to severe hypoxia decreases in aged rats. Neuroscience Letters, 161(1), 97–100. https://doi.org/10.1016/0304-3940(93)90149-F

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