Back to quiz

6. How much does plasma volume reduce by in the first 24hrs in space?

  • 23%
  • 17%
  • 11%
  • 29%

7. How many miles above the Earth has a field strength of 89% of what it is on Earth?

  • 200
  • 350
  • 250
  • 100

8. What is the gravitational force on earth?

  • 9.81ms
  • 9.18ms
  • 9ms
  • 10.81ms

9. What is not a way that immune function could have been affected?

  • Lack of light
  • Physical stress
  • Mechanical forces
  • Emotional stress

10. What is the rate of loss of bone in space?

  • 1-2% per month
  • 3-4% per month
  • 5-10% per month
  • 8-12% per month

11. Distension of vascular baroreceptors leads to what occurring to the renin-angiotensin system?

  • No change
  • Reduction
  • Increase

12. How does microgravity affect lymphocyte, NK and T cell activation?

  • No effect
  • Decreases
  • Increases

13. Why are astronauts prone to fainting on return to Earth?

  • More gravity
  • High blood pressure
  • Redistribution of blood flow back to legs
  • Much more light

14. Higher ambient CO2 leads to respiratory acidosis, which doesn't causes a loss of what?

  • Phosphate
  • Acetylcholine
  • Calcium ions
  • Bicarbonate

15. What is not a way that psychosocial effects can be countered?

  • Time - wears off naturally
  • Rigorous selection process
  • Sleeping medication

16. What is the condition called when a subject is in a zone of little gravity and appears weightless?

  • Hyperthermic
  • Hypoxic
  • Microgravity
  • Hyperbaric

17. What is not a way to counter fluid redistributions?

  • Negative pressure suits
  • Isotonic fluids to bulk plasma volume
  • Nutritional supplements
  • Exercise during microgravity

18. High light levels prevent reabsorption of calcium ions

  • False
  • True

19. The loss of bone will always be reversible on return to Earth

  • False
  • True

20. By how much does blood volume decrease by?

  • 15%
  • 5%
  • 10%
  • 20%