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How Much Do You Know About Bones?

Are you a bone whiz or a bonehead? Take a bone quiz to find out.

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5. Adults have 206 bones in their body. Babies are born with:

a. 206 bones

b. 150 bones

c. 300 bones

d. 185 bones

Answer: c. Babies are born with about 300 bones, almost a third of which eventually fuse together to form the 206-bone skeleton of an adult. Further, some of the "bones" in a baby's body are not really bone at all, but instead cartilage, a soft and flexible material that eventually grows into a bone. Calcium and other nutrients are what help baby's bones fuse and grow into a strong skeletal structure.

6. Which type of bone break most often leads to death in people over 65?

a. Skull fracture

b. Spine fracture

c. Hip fracture

d. Collarbone fracture

Answer: c. When it comes to deaths from injuries in senior citizens, data from the CDC tell us that falls are one of the leading causes, with hip fractures the No. 1 cause of fall-related deaths. Moreover, hip fractures are the cause of the most severe health problems in this age group, and they're also responsible for a dramatic reduction in quality of life. About 80% of hip fractures occur in women, with the rate increasing dramatically between ages 65 and 85. According to the CDC, by age 90, one in three women will sustain a hip fracture.

7. The most common site of bone break seen in hospital emergency rooms is in the:

a. Wrist/hand/fingers

b. Skull

c. Ankle/Foot/Toes

d. Hip

Answer: a. According to data provided by the American Academy of Orthopaedic Surgeons, in 2004 the leading bone break seen in hospital emergency rooms was a fracture of the wrist, hand, or fingers, with some 1,093,000 cases in the U.S. Next in line were ankle, foot, and toe fractures (783,000), followed by lower arm fractures (763,000) and upper arm fractures (342,000).

8. Nutrients necessary for healthy bones include:

a. Calcium and vitamin D

b. Zinc and magnesium

c. Protein

d. All of the above

Answer: d. Though calcium is a key nutrient for strong bones, vitamin D is also necessary in order for bones to absorb calcium -- one reason why milk is often fortified with this nutrient. That said, zinc, magnesium, and protein are also found in milk and are important for strong bone health.

Among the best sources of calcium are low-fat or nonfat milk or cheese, yogurt, broccoli, almonds, and calcium-fortified foods such as orange juice, cereals, soy beverages, and tofu products.

9.Which of the following lifestyle habits affects bone health:

a. Smoking

b. Exercise

c. Excessive alcohol consumption

d. All of the above

Answer: d. While smoking and alcohol affect bones in a negative way, exercise can have a positive effect on bone health. Studies have shown a direct link between smoking and a decrease in bone density that in turn increases the risk of a bone-thinning disorder known as osteoporosis.

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