Living in Space Harms Your Body

What do osteoclasts and osteoblasts do?

• Osteoclasts are cells that break down bone tissue. Osteoblasts are cells that make new bone tissue.

• Osteoblasts are cells that break down bone tissue. Osteoclasts are cells that regenerate bone tissue.

Tags

NGSS.HS-LS1-4

What is spaceflight osteopenia and what causes it?

• Osteopenia is the gain of bone mass because lack of gravity lets bones grow.

• Osteopenia is the loss of bone mass due to lack of gravity.

• Oseopenia is a disease of the bones that makes them become solid.

How does six months spent in the international space station affect an astronaut's bones?

• Approximately 50% of a person's bone mass is lost

• Approximately 20% of a person's bone mass is lost

• Approximately 10% of a person's bone mass is lost

• Approximately 30% of a person's bone mass is lost

In 2006, Heide Stefanyshyn-Piper, an astronaut who returned from a 12 day space mission fainted twice during a welcome home ceremony. What is the best explanation for the cause?

• She was hungry

• She was overwhelmed with excitement of being home

• The weakening of her heart muscle didn't allow her to pump blood throughout her body fast enough.

• Lack of blood

In paragraph 1, what does the word prolonged mean.

• Shortened

• Lengthy

• Far distances

• a professional runner

In paragraph 2, what does the word regenerate mean?

• Lose

• Gain

• Make more of the same

• Blow up

Tags

NGSS.HS-LS1-4

In paragraph 5, the word atrophy means?

• Waste away or shrinkage

• Grow or gain size

• Weaken

• Strengthen