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Biomedical subjects

H A BERN

Publications and source records attributed to H A BERN.

At least 19 recordsLinked to original sources
PubMed1964

THYSANURAN MEDIAN FRONTAL ORGAN: ITS STRUCTURAL RESEMBLANCE TO PHOTORECEPTORS.

The median frontal organ of Thermobia domestica (Packard) and the median ocellus of Tricholepidion gertschi Wygodzinsky were compared with respect to location, innervation, and fine structure. The data suggest that the two organs are homologous. Elementary neurosecretory granules were not found in the median frontal organ, but multivesicular bodies are present in both the frontal organ and ocellus

Animals↗
PubMed1963

ELECTROPHYSIOLOGIC INDICATIONS OF THE OSMOREGULATORY ROLE OF THE TELEOST UROPHYSIS.

Tilapia mossambica when placed in salt water shows an increase in the frequency of spontaneous discharges in some neurosecretory fibers in the urophysis of the caudal neurosecretory system. Exposure to tap water usually depresses this activity. The nature of the ion-regulatory action of the caudal neurosecretory system of teleosts remains conjectural, but the data currently available indicate the possible production of two kinds of neurohormones, one which favors ion movement in the normal direction and another which has the opposite eJffect in response to abnormal osmotic circumstances.

Animals↗