Hormone and glucose dynamics at physical exertion, at photoperiodic factor and hypoxia

Abstract

The purpose of this research was to study the dynamics of melatonin, insulin, adrenaline and glucose in the blood of rabbit kits (prior and subsequent to prenatal hypoxia) at various stages of fetal growth and development; to study the ability of kits to withstand physical exertion of various intensity and duration in light and dark. The study of hypoxia exposure factors, photoperiodic factors and methods for correcting its effects is one of the pressing issues currently facing experimental and clinical physiology. In this context, it is important to study the effect of prenatal hypoxia on hormones synthesizing and expressing principles in the early periods of postnatal ontogenesis. This research shows that melatonin level decreases with increasing insulin and increases with decreasing insulin in animals of different ages kept under conditions of constant light and constant darkness, while the level of adrenaline decreases at physical exertion, but increases with a decrease in melatonin. This research confirms the inverse relationship between the levels of melatonin and insulin and between the levels of melatonin and adrenaline. Kits being in constant darkness have increasing melatonin, which by contrast decreases under conditions of constant light.