KIDS QUIZ
SPACE EXPLORATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Astronauts do not need to support body weight in space
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Astronauts are restricted to a confined living area in space.
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It is not possible for astronauts to exercise vigorously in space.
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It is difficult for astronauts to consume a balanced diet in space.
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Detailed explanation-1: -Bone loss occurs in the weightless environment of space because bones no longer have to support the body against gravity. On Earth, gravity applies a constant mechanical load to the skeletal system, that causes healthy bones to maintain a certain density so that they are able to support the body.
Detailed explanation-2: -Bone loss and kidney stones are well known as essential problems for astronauts to overcome during extended stays in space. Crew members engage in physical exercise for two and a half hours a day, six times a week (fifteen hours a week) while in orbit to avoid these issues.
Detailed explanation-3: -Microgravity has the opposite effect. It reduces the load that gravity naturally places on muscles, interrupting protein synthesis so that fibers begin to atrophy. This loss of muscle mass contributes to reduced skeletal muscle strength when astronauts return to Earth.
Detailed explanation-4: -Crew members must exercise every day to prevent bone and muscle loss. Exercise is an important part of the daily routine for astronauts aboard the station to prevent bone and muscle loss. On average, astronauts exercise two hours per day.