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Space Medicine and Human Physiology

Space Medicine

Scientific facts regarding the effects of spaceflight on the human body and medical research conducted in microgravity.

medicine space physiology science

12 Questions Medium Ages 12+ Sep 19, 2026

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About this Study Set

This study set covers Space Medicine through 12 practice questions. Scientific facts regarding the effects of spaceflight on the human body and medical research conducted in microgravity. Every question includes the correct answer so you can learn as you go — pick any format above to get started.

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1 What is the primary cause of 'space adaptation syndrome' experienced by astronauts during their initial transition to microgravity?

A Increased atmospheric pressure
B Disturbance of the vestibular system
C Dehydration from cosmic radiation
D Cardiac arrhythmia

2 During long-duration spaceflight, what happens to bone mineral density in astronauts without rigorous countermeasures?

A It increases significantly
B It remains entirely unchanged
C It decreases due to lack of mechanical loading
D It crystallizes into new minerals

3 Which fluid shift phenomenon occurs in astronauts due to the absence of gravity pulling blood toward the legs?

A Cephalad fluid shift
B Peripheral vascular collapse
C Pulmonary edema
D Severe localized anemia

4 What is a known ocular change observed in some astronauts after long-duration missions, often referred to as SANS?

A Corneal scarring
B Spaceflight Associated Neuro-ocular Syndrome
C Permanent color blindness
D Cataracts from solar flares

5 Why are astronauts at an increased risk of developing kidney stones during space missions?

A Excessive oxygen consumption
B Increased bone resorption releasing calcium into the blood
C Radiation exposure to the renal cortex
D High humidity in the International Space Station

6 What happens to the human heart muscle during extended periods of weightlessness?

A It expands significantly
B It undergoes atrophy due to reduced workload
C It becomes more efficient at pumping
D It develops thicker arterial walls

7 Which type of radiation poses the greatest biological health risk to astronauts traveling outside of Earth's magnetic field?

A Radio waves
B Galactic cosmic rays
C Infrared light
D Visible light

8 How is aerobic capacity generally affected by long-duration spaceflight?

A It improves due to altitude training
B It stays the same
C It decreases
D It fluctuates based on solar cycles

9 In space, muscle atrophy is most pronounced in which functional muscle groups?

A Hand muscles
B Anti-gravity muscles like the calves and back
C Facial muscles
D Bicep muscles

10 What is a potential medical concern regarding the immune system during spaceflight?

A Increased production of white blood cells
B Dysregulation or suppression of immune response
C Enhanced allergic reactions
D Spontaneous healing of wounds

11 What effect does microgravity have on the height of a human astronaut during spaceflight?

A Height decreases due to spinal compression
B Height increases temporarily due to spinal elongation
C Height remains constant
D Height is unaffected until re-entry

12 Which medication is frequently used by astronauts to mitigate motion sickness during the first few days of spaceflight?

A Promethazine
B Acetaminophen
C Amoxicillin
D Magnesium sulfate

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