22. In the circle of Willis
a. The basilar artery divides into right and left posterior cerebellar arteries
b. The middle cerebral arteries branch off and supply the motor but not sensory cortex
c. The anterior communicating artery unites the middle cerebral artery to the internal cerebral artery
d. It encircles the inferior brainstem at C2-3 level
e. The internal carotid artery gives off the ophthalmic artery before dividing into anterior and middle cerebral
arteries
23. Regarding the facial vein, all of the following are true EXCEPT:
a. It drains into the internal jugular vein
b. It has no valves
c. It communicates with the cavernous sinus via the ophthalmic vein
d. It runs inferoposteriorly anterior to the facial artery
e. It communicates with the pterygoid plexus via the deep facial vein
24. The 2nd cervical vertebra
a. Has a very small spinous process
b. Articulates with the occiput
c. Has a bifid spinous process
d. It referred to as the atlas
e. Has a dens that occupies the posterior 1/3 of the canal
25. Regarding the larynx
a. All muscles are supplied by the recurrent laryngeal nerve
b. Thyroarytenoid muscle alters the tension of the vocal cord
c. Recurrent laryngeal nerve passes anterior to the criocthyroid joint
d. During swallowing, the epiglottis acts as a passive flap
e. All of the larynx is covered by pseudostratified columnar epithelium
26. Regarding the vertebral column all are correct EXCEPT:
a. The facet joints in the lumbar spine lie in an anteroposterior plane
b. The vertebral arteries ascend through the foramen in the transverse processes of the upper six cervical
vertebrae
c. The spinous processes of the cervical vertebrae are usually bifid
d. Thoracic vertebrae I, II and XII have single costal facets on their pedicles
e. The sacrum has 5 sets of anterior and posterior sacral foramina, one corresponding to each of the sacral
segments
27. The internal jugular vein
a. Is surrounded by the thickest portion of carotid sheath
b. Receives drainage from all the parathyroid glands
c. Is crossed posteriorly by the accessory nerve
d. Is crossed anteriorly by the thoracic duct
e. Contains valves within its lumen