Bones and Space: A Skeletal System Quiz

Why are astronauts like Scott Kelly and Mikhail Kornienko considered scientific heroes?

• They completed the longest mission on the ISS
• They discovered a new planet
• They invented a new space technology
• They proved humans can survive indefinitely in space

In microgravity, how much bone loss do astronauts typically experience per month?

• 0.5% bone loss
• 1-2% bone loss
• 5% bone loss
• 10% bone loss

What are osteocytes primarily responsible for in bone tissue?

• Producing new blood cells
• Monitoring and maintaining bone matrix
• Storing fat
• Generating hormones

How often does a human essentially get a 'new' skeleton?

• Every 3-5 years
• Every 7-10 years
• Every 15-20 years
• Every 25-30 years

What is the primary function of osteoclasts in bone tissue?

• Building new bone
• Breaking down old bone tissue
• Producing blood cells
• Storing minerals

How many bones does an average human body contain?

• 186 bones
• 206 bones
• 226 bones
• 246 bones

Which type of bone marrow is responsible for producing blood cells?

• Yellow marrow
• Red marrow
• White marrow
• Green marrow

What percentage of bone loss might an astronaut experience during a year in space?

• 10%
• 15%
• 20%
• 25%

What chemical compound crystallizes to form the mineral component of bone?

• Calcium carbonate
• Calcium phosphate
• Sodium chloride
• Potassium nitrate

How do bones help maintain homeostasis?

• By regulating blood calcium levels
• By producing oxygen
• By filtering water
• By generating heat