Illustrated Anatomy of the Head and Neck 5th Edition by Margaret J. Fehrenbach
Illustrated Anatomy of the Head and Neck 5th Edition by Margaret J. Fehrenbach
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Chapter 08: Nervous System
Complete Chapter Questions With Answers
Sample Questions Are Posted Below
MULTIPLE CHOICE
| a. | Resting potential |
| b. | Action potential |
| c. | Refractory period |
| d. | Repolarization |
ANS: B
| Feedback | |
| A | The resting potential occurs when the difference in charge exists and the outside of the nerve cell membrane has a positive charge, while the inside has a negative charge. It occurs in the nonstimulated nerve. |
| B | Local anesthetic agents are administered to prevent an action potential, which is a rapid depolarization of the nerve cell membrane resulting in generation of a nerve impulse. An action potential temporarily reverses the resting potential that exists. |
| C | The refractory period refers to a brief period after an action potential, during which the nerve CANNOT be stimulated. |
| D | The repolarization reestablishes the resting potential. |
DIF: Comprehension REF: p. 174 OBJ: 2
TOP: CDA: General Chairside, I. A. Demonstrate understanding of basic oral and dental anatomy, physiology, and development
MSC: NBDHE, Scientific Basis for Dental Hygiene Practice, 1.1 Anatomy | NBDHE, Scientific Basis for Dental Hygiene Practice, 2.0 Physiology
| a. | Both statements are true. |
| b. | Both statements are false. |
| c. | The first statement is true; the second is false. |
| d. | The first statement is false; the second is true. |
ANS: C
| Feedback | |
| A | Although the nerves are antagonistic to one another, they are part of the autonomic nervous system, NOT the somatic nervous system. |
| B | Although the nerves are antagonistic to one another, they are part of the autonomic nervous system, NOT the somatic nervous system. |
| C | Although the nerves are antagonistic to one another, they are part of the autonomic nervous system, NOT the somatic nervous system. |
| D | Although the nerves are antagonistic to one another, they are part of the autonomic nervous system, NOT the somatic nervous system. |
DIF: Recall REF: p. 176 OBJ: 3
TOP: CDA: General Chairside, I. A. Demonstrate understanding of basic oral and dental anatomy, physiology, and development
MSC: NBDHE, Scientific Basis for Dental Hygiene Practice, 1.1 Anatomy
| a. | Puckering the lips |
| b. | Feeling when biting the tongue |
| c. | Toothache in the jaw |
| d. | Chewing a piece of gum |
ANS: D
| Feedback | |
| A | The muscles that surround the lip are muscles of facial expression such as that which occurs with puckering of the lips and are innervated by the seventh cranial nerve or facial nerve. |
| B | Sensations such as pain from biting the tongue are carried by the afferent or sensory component of the fifth cranial nerve or trigeminal nerve. |
| C | Sensations such as pain from a toothache are carried by the afferent or sensory component of the fifth cranial nerve or trigeminal nerve. |
| D | The efferent or motor part of the fifth cranial nerve or trigeminal nerve innervates the muscles of mastication such as that which occurs with chewing. |
DIF: Comprehension REF: p. 179 OBJ: 4
TOP: CDA: General Chairside, I. A. Demonstrate understanding of basic oral and dental anatomy, physiology, and development
MSC: NBDHE, Scientific Basis for Dental Hygiene Practice, 1.1 Anatomy | NBDHE, Scientific Basis for Dental Hygiene Practice, 2.0 Physiology
| a. | Foramen ovale and foramen rotundum |
| b. | Foramen spinosum and external acoustic meatus |
| c. | Internal acoustic meatus and external acoustic meatus |
| d. | Internal acoustic meatus and stylomastoid foramen |
ANS: D
| Feedback | |
| A | Both the foramen ovale and foramen rotundum are associated with the maxillary and mandibular nerves, the second and third divisions, respectively, of the fifth cranial nerve or trigeminal nerve. |
| B | Seventh cranial nerve or facial nerve is NOT associated with and does NOT travel through the foramen spinosum and external acoustic meatus. |
| C | Although the seventh cranial nerve or facial nerve enters the skull and travels through the temporal bone, it does NOT exit the temporal bone through the external acoustic meatus, which is the opening to the external ear. |
| D | The seventh cranial nerve or facial nerve leaves the brain through the internal acoustic meatus, travels through the temporal bone, and exits the skull through the stylomastoid foramen. |
DIF: Recall REF: p. 180 OBJ: 4
TOP: CDA: General Chairside, I. A. Demonstrate understanding of basic oral and dental anatomy, physiology, and development
MSC: NBDHE, Scientific Basis for Dental Hygiene Practice, 1.1 Anatomy | NBDHE, Scientific Basis for Dental Hygiene Practice, 2.0 Physiology
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