Example YouTube

Who were the two astronauts mentioned as having begun a one-year mission aboard the ISS in March of 2015?

• Chris Hadfield and Peggy Whitson

• Yuri Gagarin and Valentina Tereshkova

• Scott Kelly and Mikhail Kornienko

• Neil Armstrong and Buzz Aldrin

What is the average rate of bone loss experienced by astronauts in space each month?

• 0.5 to 1 percent

• 1 to 2 percent

• 2 to 3 percent

• 3 to 4 percent

How often do humans typically get a whole new skeleton due to bone regeneration?

• Every 7 to 10 years

• Every 3 to 5 years

• Every 20 to 25 years

• Every 12 to 15 years

What is the primary function of osteoblasts?

• Regulating blood calcium levels

• Building bone tissue

• Producing blood cells

• Breaking down bone tissue

What is the main reason astronauts experience significant bone loss in space?

• Lack of physical exercise

• Exposure to cosmic radiation

• Microgravity environment

• Limited dietary calcium

What is the role of osteoclasts in the skeletal system?

• They build new bone tissue

• They store energy as fat

• They produce blood cells

• They break down old bone tissue

How many bones does an average human body contain?

• 406

• 306

• 206

• 106

What are the two main groups into which anatomists divide human bones?

• Upper and Lower

• Internal and External

• Axial and Appendicular

• Solid and Hollow

What is hematopoiesis?

• The formation of bone tissue

• The regulation of blood calcium levels

• The process of muscle contraction

• The production of blood cells

What is the primary material that osteoblasts use to form the bone matrix?

• Elastin

• Collagen

• Keratin

• Myosin