Osteoporosis can result from excessive production of RANKL by osteoblasts. A molecule that directly inhibits RANKL and protects bones from osteoclast overactivity is:
A. PTH
B. osteoprotegerin
C. alkaline phosphatase
D. osteoid
E. RANK
ANS: B
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An abnormal sideways bend and sway in the vertebral column is called ________.
A. lordosis B. kyphosis C. scoliosis D. convexities
An epithelium always has an exposed surface, which is referred to as the ________ surface.
What will be an ideal response?
In October 2001 at the site of the World Trade Center in New York City, fires were still
burning from the terrorist attacks that had brought down the buildings. The greatest danger to the respiratory system was A) falling material from damaged buildings. B) very large particles of debris. C) very small particles of debris. D) the odor.
All lymph rejoins the bloodstream via the subclavian veins
Indicate whether the statement is true or false