Biobeyond Unit 8: Lifting Tons and
Skeletons Questions and Answers Best
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What do you think is a key difference between living on Earth and in space? Click on
the pictures to find out more. - Correct Answer-I think a key difference between living in
space and Earth is that there is a gravitational pull when on Earth, but not in space.
Which of these activites do you think would be the most awkward to do in microgravity?
- Correct Answer-Eating
What skeletal region do you think works the hardest to hold your body upright on Earth?
Use the star to label that area. - Correct Answer-Star on legs
Bone Resorbing Cell - Correct Answer-Uses enzymes to dissolve bones
Releases calcium into bloodstream
OsteoClasts
Bone Builder Cell - Correct Answer-Uses calcium to thicken bone
Called OsteoBlasts
When more load is put on a bone, ___ signal ___ to increase bone density. - Correct
Answer-osteocytes, osteoblasts, increase
When less load is put on a bone, ___ signal ___ to decrease bone density. - Correct
Answer-osteocytes, osteoclasts, decrease
Think about how your bones react to varying loads on Earth. Use what you know to
determine to whom the bones on the right belong. - Correct Answer-Jake- B
Rami- A
Which phrase best matches the relationship between load-bearing and bone density? -
Correct Answer-Use it or lose it
Match descriptions to the pictures below to construct an explanation of why astronauts
lose so much bone mass. - Correct Answer-Astronauts experience weightlessness..
