Abstract

The diverse types of neurosecretory cells located in the brain and suboesophageal ganglion of the scorpionHeterometrus have shown morphological evidence of activity in relation to diverse physiological functions. Some of the functions investigated were the process of delivery of the young, apolysis, ecdysis, growth, maturation, water relations, diurnal rhythms of locomotor activity and temperature adaptation. Continuous light and continuous darkness reflected change in the activity of specific groups of neurosecretory cells. In this Arachnid also, neurosecretion seems to play a central role in the regulation of many physiological activities as in insects and other organisms.

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