6. Bones & Skeletal Tissue

Why does a second fracture in the same bone tend to occur at a site different from that of the first fracture?

How could a disease that affects primarily cartilage impact bone growth and bone formation?

How could diseases of the kidney, skin, and/or intestines cause diseases of the bone?

Explain how abnormal bone structure could affect muscle function.

Which bones form via intramembranous ossification?

a. Irregular bones

b. Certain flat bones

c. Long bones

d. Short bones

e. More than one of the above

Explain why young men who take anabolic steroids (which mimic the actions of testosterone) often display stunted growth and have an overall shorter stature.

Where would you be most likely to find an irregular bone?

Explain why a person who is wheelchair-bound or bed-bound often has very low bone mass, especially in his or her legs.

Explain the effect that the following hormones have on the growth of bone tissue:

c. Estrogen

Mark the following statements as true or false. If a statement is false, correct it to make a true statement.

c. The greater the load the bone must carry, the more bone that is resorbed by osteoclasts.

Lucy Dupre is a 2-year-old girl living in northern Canada. You notice that her growth seems abnormally slow and she has exhibited signs of weakened bones, including fractures. Her parents admit they have not supplemented her diet with vitamin D, as they feel that any supplementation is 'unnatural' and 'not organic.' Explain why Lucy is having problems with her bones and bone growth.