Illustrated Dental Embryology Histology and Anatomy 4th ed By Margaret J. Fehrenbach -Test Bank
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Dental Test Bank
Chapter 03: Prenatal Development
MULTIPLE CHOICE
1. The folding of the embryo during prenatal development causes _____ to be on the _____.
a.
endoderm; inside of the embryo
b.
ectoderm; inside of endoderm
c.
endoderm; outside of the mesoderm
d.
mesoderm; outside of the ectoderm
...
1. Which of the following facial features is located laterally to each naris?
a. Orbit
b. Nasal ala
c. Nasal septum
d. Philtrum
ANS: B
The nares are separated by the midline nasal septum. The nares are also bounded laterally by
winglike cartilaginous structures, each ala (plural, alae) of the nose. In the orbital region of the
face, the eyeball and all its supporting structures are contained in the orbit of the skull, the
bony eye socket. On the midline of the upper lip extending downward from the nasal septum
is a vertical groove, the philtrum.
REF: Chapter 1, Nasal Region, Page 2
2. The lips are outlined from the surrounding skin by a transition area called the:
a. philtrum.
b. mucogingival junction.
c. mucocutaneous junction.
d. mandibular symphysis.
ANS: C
The vermilion zone of each lip has a darker appearance than the surrounding skin, with the
lips outlined from the surrounding skin by a transition zone, the mucocutaneous junction. On
the midline of the upper lip extending downward from the nasal septum is a vertical groove,
the philtrum. The line of demarcation between the firmer and pinker attached gingiva and the
movable and redder alveolar mucosa is the scallop-shaped mucogingival junction. The
midline of the mandible is marked by the mandibular symphysis.
REF: Chapter 1, Oral Region, Page 2
3. Which of the following structures can be palpated in the anterior midline of the neck?
a. Thyroid cartilage
b. Parathyroid glands
c. Sternocleidomastoid muscle
d. Submandibular salivary gland
ANS: A
Found in the anterior midline and inferior to the hyoid bone is the thyroid cartilage, which is
the prominence of the “voice box,” or larynx. The vocal cords, or ligaments of the larynx, are
attached to the posterior surface of the thyroid cartilage. The parathyroid glands are located
close to or within the posterior aspect of the thyroid gland but cannot be palpated in a patient;
the thyroid gland can be palpated on a patient within the midline cervical area. The large strap
muscle, the sternocleidomastoid muscle, is easily palpated on each side of the neck. The
submandibular salivary gland is in the neck region but not in the midline.
, REF: Chapter 1, Neck Regions, Page 8
4. Which of the following statements concerning the zygomatic arch is correct?
a. The temporomandibular joint is superior.
b. The infraorbital region is inferior.
c. It overlies the mandible.
d. The external ear is posterior.
ANS: D
Farther laterally to the infraorbital region is the zygomatic region, which overlies the bony
support for the cheek, the zygomatic arch. The zygomatic arch extends from just below the
lateral margin of the eye toward the middle part of the external ear, which is located
posteriorly. Inferior to the zygomatic arch and just anterior to the external ear is the
temporomandibular joint.
REF: Chapter 1, Zygomatic Region, Page 2
5. One of the muscles forming the cheek is the strong _____ muscle, which is felt when a patient
clenches the teeth together.
a. lateral pterygoid
b. masseter
c. medial pterygoid
d. temporalis
ANS: B
The buccal region of the face is composed of the soft tissue of the cheek. The cheek forms the
side of the face and is a broad area of the face between the nose, mouth, and ear. Most of the
upper cheek is fleshy, mainly formed by a mass of fat and muscles. One of the muscles
forming the cheek is the strong masseter muscle, which is palpated when a patient clenches
the teeth together. The pterygoid muscles are also located on each side of the face near the
mouth, and the temporalis is located in the temporal region.
REF: Chapter 1, Buccal Region, Page 2
6. Just inferior to the zygomatic arch and just anterior to the external ear is the:
a. temporomandibular joint.
b. infraorbital region.
c. mental region.
d. parotid gland.
ANS: A
Inferior to the zygomatic arch and just anterior to the external ear is the temporomandibular
joint. The infraorbital region of the face is located inferior to the orbital region and lateral to
the nasal region. Farther laterally is the zygomatic region, which overlies the bony support for
the cheek, the zygomatic arch. The zygomatic arch extends from just below the lateral margin
of the eye toward the middle part of the external ear. The chin is the major feature of the
mental region of the face; the bone underlying the mental region is the mandible, or lower jaw.
The parotid is located irregularly from the zygomatic arch down to the posterior border of the
lower jaw.
REF: Chapter 1, Zygomatic Region, Page 2
, 7. The _____ salivary gland is located irregularly from the zygomatic arch down to the posterior
border of the lower jaw.
a. parotid
b. submandibular
c. von Ebner
d. sublingual
ANS: A
The parotid is located irregularly from the zygomatic arch down to the posterior border of the
lower jaw. Both the submandibular salivary and sublingual are in the neck region. The von
Ebner refers to minor glands located deep to the circumvallate lingual papillae on the dorsal
surface of the tongue.
REF: Chapter 1, Buccal Region, Page 2
8. The _____ extends from just below the lateral margin of the eye toward the middle part of the
external ear.
a. temporomandibular joint
b. zygomatic arch
c. labial commissure
d. infraorbital region
ANS: B
The zygomatic arch extends from just below the lateral margin of the eye toward the middle
part of the external ear. Inferior to the zygomatic arch and just anterior to the external ear is
the temporomandibular joint. The upper and lower lips meet at each corner of the mouth at the
labial commissure. The infraorbital region of the face is located inferior to the orbital region
and lateral to the nasal region.
REF: Chapter 1, Zygomatic Region, Page 2
9. The main feature of the _____ region of the face is the external nose.
a. infraorbital
b. zygomatic
c. nasal
d. temporal
ANS: C
The main feature of the nasal region of the face is the external nose. The infraorbital region of
the face is located inferior to the orbital region and lateral to the nasal region. Farther laterally
is the zygomatic region, which overlies the bony support for the cheek, the zygomatic arch.
The temporal region is on the lateral side of the head at the temple.
REF: Chapter 1, Nasal Region, Page 1
10. Which of the following orofacial structures is located in the midline of the face or neck?
a. Philtrum
b. Submandibular salivary gland
c. Naris and ala
d. Parotid salivary gland
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