Chapter 09: Pharyngeal Apparatus

Chapter 09: Pharyngeal Apparatus

Complete Chapter Questions With Answers

Sample Questions Are Posted Below

MULTIPLE CHOICE

Directions: Each group of questions below consists of a numbered list of descriptive words or phrases accompanied by a diagram with certain parts indicated by letters or by a list of lettered headings. For each numbered word or phrase, select the lettered part or heading that matches it correctly and then insert the letter in the space to the right of the appropriate number. Sometimes more than one numbered word or phrase may be correctly matched to the same lettered part or heading.

________ Supplied by the vagus nerve

ANS:  E

The fourth pharyngeal arch is supplied by the superior laryngeal branch of the vagus nerve (CN X). This nerve supplies pharyngeal and laryngeal muscles that develop from this arch.

________ Its cartilage forms stapes

ANS:  C

The dorsal end of the second arch cartilage (Reichert cartilage) ossifies to form the stapes of the middle ear and the styloid process of the temporal bone. The ventral ends of the cartilages form the lesser horns and the superior part of the body of the hyoid bone. The perichondrium of this cartilage forms the stylohyoid ligament.

________ Forms the inferior part of the face

ANS:  B

The mandibular prominences of the first pharyngeal arches form the inferior part of the face. The mandible develops in these prominences by intramembranous bone formation around the first arch cartilages.

________ Gives rise to lateral palatal process

ANS:  A

The lateral palatal processes arise as mesenchymal projections from the inner surfaces of the maxillary prominences of the first pharyngeal arches. The lateral palatine processes grow toward each other and fuse to form the posterior palate.