Effects of calcium and potassium injected into the cerebral ventricles of the cat

@article{Feldberg1957EffectsOC,
  title={Effects of calcium and potassium injected into the cerebral ventricles of the cat},
  author={W. S. Feldberg and STEPHEN L. Sherwood},
  journal={The Journal of Physiology},
  year={1957},
  volume={139}
}

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As organisms have become more complex, they have also become more sensitive to their internal environment, for example, in higher animals, to the temperature, pH, and osmotic pressure of the blood and lymph.

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