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Biosatellite 3: a physiological interpretation.

J P Meehan1

  • 1University of Southern California School of Medicine, Department of Physiology, Los Angeles, Calif., USA.

Life Sciences and Space Research
|January 1, 1971
PubMed
Summary

A macaque monkey experienced physiological stress during a short spaceflight. Central blood volume shifts, hypothermia, and restraint likely caused dehydration and electrolyte imbalances.

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Area of Science:

  • Space medicine
  • Primate physiology
  • Cardiovascular research

Background:

  • Early spaceflight missions explored the physiological effects of space on living organisms.
  • Understanding these effects is crucial for astronaut health and long-duration space missions.

Purpose of the Study:

  • To investigate the physiological responses of a macaque monkey during an early, short-duration spaceflight.
  • To analyze the impact of weightlessness, hypothermia, and restraint on fluid and electrolyte balance.

Main Methods:

  • A macaque monkey was subjected to a spaceflight mission.
  • Physiological data, including blood volume shifts and potential metabolic disturbances, were collected.
  • Environmental factors such as hypothermia and restraint were noted.

Main Results:

  • Weightlessness and hypothermia caused central blood volume shifts, driving a reduction in overall blood volume.
  • Restraint, vestibular disturbances, and polydipsia disrupted salt and water metabolism, likely impairing kidney function and leading to excessive salt loss.
  • A combination of dehydration and electrolyte imbalance was suspected.

Conclusions:

  • Spaceflight conditions, including weightlessness and hypothermia, significantly impact primate physiology, particularly fluid balance.
  • Restraint and sensory disturbances exacerbate physiological stress, potentially leading to severe dehydration and electrolyte disturbances.
  • Further research is needed to fully understand and mitigate these risks for future space exploration.

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