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[Structuro-functional changes in bushy interoceptors during protracted anoxia].

V G Lukashin, V V Vshivtseva

Arkhiv Anatomii, Gistologii I Embriologii

|July 1, 1985

Summary

Frog urinary bladder receptors undergo complex changes after 60 minutes of anoxia, affecting their structure and electrical activity. These findings reveal functional heterogeneity in these sensory receptors.

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Area of Science:

Physiology
Cell Biology
Histology

Background:

The frog urinary bladder contains specialized receptors sensitive to various stimuli.
Anoxia, a condition of oxygen deprivation, can significantly impact cellular function and morphology.

Purpose of the Study:

To investigate the morphological, tinctorial, and electrophysiological responses of frog urinary bladder receptors to prolonged anoxia.
To elucidate the ultrastructural changes in these receptors at the mitochondrial level.

Main Methods:

Exposure of frog urinary bladders to 60 minutes of anoxia.
Assessment of bioelectrical activity dynamics.
Vital staining with methylene blue to evaluate tinctorial properties.
Ultrastructural analysis focusing on mitochondrial changes.

Main Results:

A biphasic change in bioelectrical activity (initial increase, then decrease) was observed.
Prolonged vital staining periods and altered staining characteristics of receptory plates occurred.
Ultrastructural analysis revealed heterogeneous changes in mitochondria, with some showing reduced cristae and osmiophilicity, while others increased or remained unchanged.
Reduced granuloformation and weakened plate mobility were noted.

Conclusions:

Anoxia induces complex and heterogeneous responses in frog urinary bladder receptors.
The observed ultrastructural and functional changes suggest inherent functional heterogeneity within these receptor units and their components.

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