Which of the following statements is true about teeth?
A. The primary component of teeth is dentin.
B. The outer surface of enamel forms the crown of a tooth.
C. The root is covered by cementum.
D.
All of the choices are correct.
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Question 2) Mastication is one component of the mechanical digestion of food.
Indicate whether this statement is true or false.
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Question 3) Mastication is a process that facilitates
A. propulsion of materials through the intestine, and it involves simultaneous secretion of enzymes.
B. mixing of food within the stomach, and it occurs with simultaneous hormone secretion there.
C. swallowing of food, and it increases the surface area of the food for exposure to enzymes.
D. absorption of nutrients into the bloodstream, and it involves carrier proteins in the epithelium.
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Question 4) The projections on the superior surface of the tongue, some of which house taste buds, are the
A. tonsils.
B. cilia.
C. rugae.
D. glossal spines.
E. papillae.
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Question 5) Which cranial nerves innervate the salivary glands?
A. V and VII
B. XI and XII
C. VII and IX
D. VI and IX
E. V and XI
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Question 6) . Late one night, while studying for your anatomy class, you open a box of saltine crackers to do a little snacking. After chewing on a starchy morsel for a few minutes, you begin to notice a sweet taste in your mouth. What accounts for this?
A. Sweet taste receptors are slower to respond than others
B. Activity of bacteria in the mouth lowers the pH
C. Esophageal reflux
D. Salivary amylase activity
E. Phagocytosis by the pharyngeal tonsils produces by-products that taste sweet
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Question 7) Lysozyme within saliva primarily functions to
A. moisten and disperse food.
B. initiate the chemical breakdown of starch.
C. inhibit bacterial growth.
D. wash materials off teeth.
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Question 8) Sympathetic stimulation causes saliva to be more viscous.
Indicate whether this statement is true or false.
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Question 9) Which layer(s) of the wall of the GI tract contain a nerve plexus?
A. Muscularis only
B. Mucosa and serosa
C. Adventitia only
D. Mucosa and muscularis
E. Submucosa and muscularis
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Question 10) The mastication center is located in the _____________ of the brain.
A. hippocampus and amygdala
B. medulla and pons
C. hypothalamus
D. entorhinal cortex and basal nuclei
E. solitary nucleus