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← ScienceWhich consequence results when an astronaut exceeds g-force limits?
A)Greyout due to cerebral ischemia✓
B)Muscular atrophy from inactivity
C)Radiation poisoning from cosmic rays
D)Bone density loss from weightlessness
💡 Explanation
Cerebral ischemia happens because increased g-force causes blood pooling in lower extremities. This decreases cerebral circulation due to reduced blood pressure reaching the brain. This reduced circulation causes hypoxia resulting in a greyout, therefore the greyout rather than other altitude sickness symptoms is noted.
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