PAS 407- Pharynx & Larynx Exam Questions Solved Correctly Latest 2025
What is the sytolopharyngeus m. innervated by? - Answers Supplied by glossopharyngeal n. (CN IX)
What nerve innervates most of the pharyngeal muscles? - Answers Vagus nerve (CN X)
What makes up the external circular layer of pharynx? - Answers Superior, middle, and inferior
pharyngeal constrictors
What are the internal longitudinal muscles of the pharnyx? - Answers Stylopharyngeus,
Salpingopharyngeus, Palatopharyngeus
What is the largest cartilage of laryngeal skeleton? - Answers thyroid cartilage
Cricothyroid muscle action - Answers pulls thyroid cartilage forward, stretching vocal cords (high pitch
tone)
Thyroarytenoid muscle action - Answers pulls thyroid cartilage backward, relaxing vocal cords (low pitch
tone)
Posterior cricoarytenoid muscle action - Answers Rotates arytenoid to abduct vocal fold
Lateral cricoarytenoid muscle action - Answers Rotates arytenoid to adduct vocal fold
Transverse/Oblique Arytenoid muscles - Answers Pulls arytenoids together, closing off rima glottis
What does the external laryngeal nerve supply? - Answers cricothyroid muscle
What muscles does the recurrent laryngeal nerve supply? - Answers all but one of the intrinsic muscles
of the larynx; sensory fibers to mucosa of infraglottic cavity.
What is the sytolopharyngeus m. innervated by? - Answers Supplied by glossopharyngeal n. (CN IX)
What nerve innervates most of the pharyngeal muscles? - Answers Vagus nerve (CN X)
What makes up the external circular layer of pharynx? - Answers Superior, middle, and inferior
pharyngeal constrictors
What are the internal longitudinal muscles of the pharnyx? - Answers Stylopharyngeus,
Salpingopharyngeus, Palatopharyngeus
What is the largest cartilage of laryngeal skeleton? - Answers thyroid cartilage
Cricothyroid muscle action - Answers pulls thyroid cartilage forward, stretching vocal cords (high pitch
tone)
Thyroarytenoid muscle action - Answers pulls thyroid cartilage backward, relaxing vocal cords (low pitch
tone)
Posterior cricoarytenoid muscle action - Answers Rotates arytenoid to abduct vocal fold
Lateral cricoarytenoid muscle action - Answers Rotates arytenoid to adduct vocal fold
Transverse/Oblique Arytenoid muscles - Answers Pulls arytenoids together, closing off rima glottis
What does the external laryngeal nerve supply? - Answers cricothyroid muscle
What muscles does the recurrent laryngeal nerve supply? - Answers all but one of the intrinsic muscles
of the larynx; sensory fibers to mucosa of infraglottic cavity.
