How does an extensive exercise program affect the appearance of the skeleton? Why do these changes occur?
What will be an ideal response?
Exercise causes the muscles to pull on the bones to create movement, and the greater the amount of movement, the greater the overall tension exerted on the bone. Tension on a bone causes it to build additional compact bone at that spot; therefore, bones of individuals who increase the amount of exercise they perform become more dense and have larger processes.
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The bone of the arm is the ____________________.
Fill in the blank(s) with the appropriate word(s).
The central cavity of a tooth is filled with
A. dentin. B. enamel. C. pulp. D. cementum. E. calcium phosphate.
The __________ nervous system regulates motility of esophagus, stomach, and intestines without input from brain or spinal cord.
Fill in the blank(s) with the appropriate word(s).
The pigmented skin that surrounds the nipple is the
A) zona reticularis. B) fornix. C) zona pellucida. D) peripapilla. E) areola.