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Pharyngeal Arch 3

BIO 290 Anatomy James Madison University

QuestionAnswer
What bone makes up arch 3? Hyoid
What structures are pouch 3 derivatives? Thymus gland (begins in third pouch), parathyroid glands
What is the function of the thymus gland? Useful when young for immune function, atrophies when older
What is the function of the parathyroid gland? Regulates calcium levels in blood and bone and for nerve function.
What is the 3rd arch nerve? Glossopharyngeal
The glossopharyngeal nerve is a ______ root cranial nerve. Dorsal root cranial nerve
What type of innervation does the glossopharyngeal nerve provide? Sensory and motor
What part of the hyoid is derived from arch 3? Greater horns of the hyoid
How is the larynx suspended? Fronm the greater horn of the hyoid by ligaments
What does the glossopharyngeal nerve provide parasympathetic motor innervation to? Parotid gland
What kind of gut tube innervation does the glossopharyngeal nerve give? Special gut tube sensory (taste on posterior 1/3 of tongue)
What is the function of the parotid gland? Salivary gland
What kind of innervation does the glossopharyngeal nerve provide? Sensory (special gut tube sensory and general gut tube sensory). Motor innervation
Wat kind of general gut tube sensory innervation does the glossopharyngeal nerve provide? taste for posterior 1/3 of tongue, pharynx, auditory tube, middle ear, and tympanic membrane
What kind of motor innervation does the glossopharyngeal nerve give? Motor to arch 3 muscles. parasymmpathetic visceral motor to parotid salivary gland
Stylopharyngeus O- Styloid process I-Thyroid cartilage A-Pulls thyroid cartilage up and elevates hyoid (elevates pharynx and larynx during speaking) I-Glossopharyngeal nerve
Created by: 757405106
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