Which effect most likely causes astronauts to become nauseated in space?
A) Their vestibular system cannot tell which way is down.
B) Their bodies' kinesthetic perception is thrown off by the lack of gravity.
C) Their visual system has trouble adjusting to seeing things floating and flying.
D) Their brains are being bombarded by cosmic rays.

Question

Quizplus · Accepted Answer

The vestibular system, which helps us maintain balance and orientation in space, becomes confused in the absence of gravity. This can lead to motion sickness, including nausea and vomiting.

Which Effect Most Likely Causes Astronauts to Become Nauseated in Space