Which of the following is true of the bony matrix of the skeleton as people age?
A) The proportion of collagen fibers in the matrix increases with age.
B) Its composition remains constant throughout life.
C) Its mineral content diminishes as a normal part of aging.
D) It gains calcium carbonate while losing calcium phosphate.
E) None of the answers are correct.
C) Its mineral content diminishes as a normal part of aging.
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In a gomphosis, a tooth is held in place by fibrous structures known as ________ membranes.
Fill in the blank(s) with the appropriate word(s).
The bone(s) forming the lateral wall of the orbit is/are the ____________________ and ____________________.
Fill in the blank(s) with the appropriate word(s).
Penetration of the blood-brain barrier (BBB) can be difficult due to:
a. CSF pH differences b. Molecule size c. Protein binding d. Lipophilicity e. All of the above
A peripheral process is a structure found only in ________ neurons.
A. motor B. unipolar C. bipolar D. multipolar E. association