The collection of data on the response of the skeletal and muscular systems to 14-day space flights was evaluated for loss of calcium, nitrogen, and other metabolically related elements. Considerable interindividual variability was demonstrated in all experimental factors that were measured. Calcium balance became less positive and urinary phosphate excretion increased substantially in flight despite a reduction in phosphate intake. Patterns of excretion of magnesium, sodium, potassium, and chloride were different for each subject, and, in part, could be correlated with changes in adrenocortical steroid production. The principal hormonal change was a striking decrease during flight in the urinary excretion of 17-hydroxycortocosteroids. Dermal losses of calcium, magnesium, sulfate, and phosphate were insignificant during all three phases.
Calcium and nitrogen balance, experiment M007
1971-09-01
Miscellaneous
No indication
English
Experiment M-7, calcium and nitrogen balance
NTRS | 1966
|NTRS | 1966
|Transient Heat Transfer Experiment in Subcooled Liquid Nitrogen
SAE Technical Papers | 1999
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