Explain why bone mass is “lost in space.” make sure to mention specific bone cells in your response. do you think there is any way to fight this loss?

Bone mass is "lost in space" refers to the loss of bone material of astronauts in space.In the weightless environment of the space, the bones don't have to support the body against the gravity. So without using their bones, the bones of the astronauts in space weaken, they are "lost in space". The balance between the cell that break down the bone and the cells that make up the bone is upset.