276.A carcinoma in the medial portion of the lower lip is most likely to
first metastasize via which of the following lymph nodes?
a. Submandibular
b. Parotid
c. Superficial cervical
d. Submental
e. Buccal
277.The central nervous system floats in cerebrospinal fluid. This fluid is
largely produced in the choroid plexus within the ventricular system and
should have a pressure of less than 20 cm of water. The arachnoid villi allow
cerebrospinal fluid to pass between which of the following two spaces?
a. Choroid plexus and subdural space
b. Subarachnoid space and subdural space
c. Subarachnoid space and superior sagittal sinus
d. Subdural space and cavernous sinus
e. Superior sagittal sinus and jugular vein
278.A tumor in the infratemporal fossa may gain entrance to the orbit
through which of the following?
a. The optic canal (foramen)
b. The inferior orbital fissure
c. The pterygoid canal
d. The ethmoidal sinuses
e. The superior orbital fissure
279.A 28-year-old man is treated in an emergency room for a superficial
gash on his forehead. The wound is bleeding profusely, but examination
reveals no fracture. While the wound is being sutured, he relates that while
he was using an electric razor, he remembers becoming dizzy and then
waking up on the floor with blood everywhere. The physician suspects a
hypersensitive cardiac reflex. The patient’s epicranial aponeurosis (galea
aponeurotica) is penetrated, resulting in severe gaping of the wound. The
structure overlying the epicranial aponeurosis is which of the following?
a. A layer containing blood vessels
b. Bone
c. The dura mater
d. The periosteum (pericranium)
e. The tendon of the epicranial muscles (occipitofrontalis)
410 Anatomy, Histology, and Cell Biology