INBDE (Integrated National Board Dental Examination) Practice Exam

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What skeletal structures arise from arch 4?

Laryngeal cartilages
Stapes and styloid process
Mandible and maxilla
Lesser horns of the hyoid

The correct answer is: Laryngeal cartilages

Skeletal structures arising from arch 4 include the laryngeal cartilages. In embryology, the laryngeal cartilages, which are important components of the larynx, are derived from the fourth pharyngeal arch. This arch gives rise to structures such as the thyroid cartilage, cricoid cartilage, arytenoid cartilages, and corniculate cartilages, all of which are crucial for the structure and function of the voice box. The other options are not correct because: - Choice B, the stapes and styloid process, are derived from arch 2. - Choice C, the mandible and maxilla, are derived from arch 1. - Choice D, the lesser horns of the hyoid, are derived from arch 2.