How to Survive... Long-Term Weightlessness

What is the primary reason for muscle atrophy in space?

• Lack of oxygen

• Unloading due to absence of gravity

• Poor nutrition

• Excessive exercise

Which type of exercise is crucial for astronauts to maintain bone density in space?

• Swimming

• Weight-bearing exercises

• Yoga

• Cycling

What cardiovascular change occurs in astronauts during spaceflight?

• Increase in heart size

• Heart atrophy and change in shape

• Improved circulation

• Decreased heart rate

What is a common psychological challenge faced by astronauts during long-term space missions?

• Excessive happiness

• Sleep deprivation and cognitive decline

• Increased energy levels

• Enhanced memory

Which of the following is a potential countermeasure for muscle wasting in space?

• Increased sugar intake

• Myostatin inhibitors

• Reduced protein consumption

• Extended rest periods