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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.
    By
    WebMD Feature
    Reviewed by Louise Chang, MD

    If your experience with bones is pretty much limited to putting on that skeleton costume every Halloween, then you could be cheating yourself out of important preventive care.

    Take this quiz to find out how much you know about bone health, and learn a bit about what you can do to protect your skeleton from head to toe!

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    What Causes Osteoporosis? And Why?

    Your bones are alive and constantly growing -- not static, like you see them drawn in books. Bones continually change throughout your life, with some bone cells dissolving and new bone cells growing back in a process called remodeling. With this lifelong turnover of bone cells, you replace most of your skeleton every 10 years. But for people with osteoporosis -- a thinning of the bones -- bone loss outpaces the growth of new bone. Bones become porous, brittle, and prone to fracture. Look at an...

    Read the What Causes Osteoporosis? And Why? article > >

    1. The largest bone in the human body is:

    a. Skull

    b. Spine

    c. Femur (thigh bone)

    d. Tibia (shin bone)

    Answer: c. Your femur (thigh bone) is not only the largest bone, but also the strongest one, bearing much of the weight of your body. The lower end of the femur joins to the tibia in a joint that forms your knee. The upper end is rounded into a ball that fits into a "socket" located in your pelvis to form your hip joint. The smallest bone in the body is in the ear and is only 1/8 inch long.

    2. The term "long bones" is used to describe:

    a. Very tall people

    b. Women with very long legs

    c. Bones that offer structure and mobility

    d. Any fully grown bone

    Answer: c. "Long bones" is the term used to describe any hard, dense bone that also provides strength, structure, and mobility, such as the femur.

    3. The difference between a "broken" bone and a "fractured" bone is:

    a. Severity

    b. Location

    c. Complications

    d. No difference

    Answer: d. "Break" and "fracture" are interchangeable terms that mean the same thing: The bone is broken. There are, however, different types of bone breaks. A complete break is said to occur when a bone breaks into two or more pieces; an incomplete break means the bone does not break all the way through; a compound fracture(also called an "open" fracture) occurs when a bone breaks through the skin; a simple fracture (or "closed" fracture) occurs when the bone breaks but there is no break in the skin. In children, the most common type of bone break is a greenstick fracture, a type of incomplete break that causes the bone to be bent.

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