Microgravity - Extreme Physiology 0.0 / 5 ? Sports ScienceExtreme PhysiologyUniversityNone Created by: anniecritchlowCreated on: 01-06-19 14:01 What is the gravitational force on earth? 9.81ms 1 of 26 What is the condition called when a subject is in a zone of little gravity and appears weightless? Microgravity 2 of 26 What condition is nausea and motion sickness after arriving in space? Neurovestibular disturbances 3 of 26 What cannot counter neurovestibular disturbances? Rigorous sleeping medication 4 of 26 When might neurovestibular disturbances have a negative impact? During important decisions 5 of 26 Disrupted circadian cycles has what negative effect? Psychosocial effects 6 of 26 What is not a way that psychosocial effects can be countered? Time - wears off naturally 7 of 26 How does microgravity affect lymphocyte, NK and T cell activation? Decreases 8 of 26 What is not a way that immune function could have been affected? Lack of light 9 of 26 How can immune dysregulation be countered? Nutritional supplements 10 of 26 In microgravity the legs have what % less of blood flow? 10% 11 of 26 Distension of vascular baroreceptors leads to what occurring to the renin-angiotensin system? Reduction 12 of 26 Salt and water excretion does what in space? Increases 13 of 26 What happens to plasma volume in space? Decreases 14 of 26 How much does plasma volume reduce by in the first 24hrs in space? 17% 15 of 26 What happens to haemocrit from the reduction in plasma volume? Increases 16 of 26 By how much does blood volume decrease by? 10% 17 of 26 Why are astronauts prone to fainting on return to Earth? Redistribution of blood flow back to legs 18 of 26 What is not a way to counter fluid redistributions? Nutritional supplements 19 of 26 By how much does protein synthesis decrease in space? 15% 20 of 26 What could not be playing a role in muscle atrophy? Lack of vitamin D 21 of 26 By how much does muscle fibre size reduce by? 20-50% 22 of 26 Does muscle fibre number or size get more affected? Fibre size 23 of 26 What is not a way to counter muscle atrophy in space? Resistance exercise 24 of 26 What is the rate of loss of bone in space? 1-2% per month 25 of 26 What is not a way to counter bone loss in space? Rigorous selection process 26 of 26
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