TL;DRAbstract
The endocrine system plays an important role in the adaptation to unusual environments by secreting hormones to control metabolism. Since human beings have long evolved on the surface of the Earth under a gravity environment, the weightless environment must be quite unusual for them. The purpose of this experiment is to study the mechanisms of human adaptation to a weightless environment from endocrine and metabolic changes. Our study plan is focused on four major physiological changes which were reported during past space flights or which may be expected to occur under that condition: (1) hormone and metabolic changes associated with fluid shift; (2) bone demineralization and muscle atrophy; (3) altered circadian rhythm; and (4) stress reaction during space flight.
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The endocrine system plays an important role in the adaptation to unusual environments by secreting hormones to control metabolism. Since human beings have long evolved on the surface of the Earth under a gravity environment, the weightless environment must be quite unusual for them. The purpose of this experiment is to study the mechanisms of human adaptation to a weightless environment from endocrine and metabolic changes. Our study plan is focused on four major physiological changes which were reported during past space flights or which may be expected to occur under that condition: (1) hormone and metabolic changes associated with fluid shift; (2) bone demineralization and muscle atrophy; (3) altered circadian rhythm; and (4) stress reaction during space flight.
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