Effects of Space on the Human Body

What happens to bone and muscle mass in space?

• They increase

• They become stronger

• They remain the same

• They decrease

What happens to muscles when a cast is removed after a few weeks?

• They remain the same

• They grow larger

• They shrink in size

• They become stronger

What are postural muscles?

• Muscles in your legs

• Muscles that work against gravity

• Muscles that help you breathe

• Muscles in your arms

What system helps keep blood pumping to your head when you stand up?

• Digestive system

• Respiratory system

• Cardiovascular system

• Nervous system

What happens to your balance system in weightlessness?

• It changes

• It deteriorates

• It remains the same

• It improves

What did the experiment by Hubel and Wiesel involve?

• A bird flying in space

• A dog learning new tricks

• A kitten with a patch over its eye

• A mouse running a maze

What was the result of the experiment by Hubel and Wiesel?

• The cat could not see out of the eye that had been patched

• The cat could see perfectly

• The cat's brain did not change

• The cat had better balance

Do you think that Hubel and Weisel were right to do the kitten experiment?

• Yes

• No

Explain your answer to Question 8

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What is a potential concern for humans growing up in space?

• They might become stronger

• They might become smarter

• They might develop differently

• They might become taller