2 0 1
386.
As used in line 13, what is the best synonym for
mastication?
a. digestion
b. tasting
c. biting
d. chewing
e. preparation
387.
Which
sentence best describes dentinal tubules?
a. Dentinal tubules are a layer surrounding the dentine of tooth
and tusk roots.
b. Dentinal tubules are micro-canals that radiate outward through
the dentine from the pulp cavity to the exterior cementum border.
c. Dentinal tubules are responsible
for the formation of enamel
and are lost after the enamel process is complete.
d. Dentinal tubules cover the surface of the tooth or tusk which
receives the most wear, such as the tip or crown.
e. Dentinal tubules are extremely large
teeth projecting beyond
the lips that have evolved from teeth and give certain species an
evolutionary advantage.
388.
According to the passage, all
of the following are organic
substances EXCEPT
a. cementum.
b. dentine.
c. dahllite.
d. ameloblasts.
e. collagen.
389.
According to the passage, how can natural ivory be authenticated?
a. by
ultraviolet light
b. by gamma rays
c. by physical observation
d. by
osmosis
e. by scrimshaw
390.
According to the passage, which
statement is NOT true of
enamel?
a. It is an organic substance.
b. It is the hardest of animal tissues.
c. It should never be exposed to ultraviolet light.
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