#1
Which of the following is NOT a function of the pharynx?
Digestion
ExplanationPharynx functions in swallowing and air passage, not digestion.
#2
Which part of the pharynx is responsible for the passage of air only?
Nasopharynx
ExplanationNasopharynx allows passage of air from nasal cavity to larynx, excluding food.
#3
Which cartilage forms the posterior wall of the nasopharynx?
Pharyngeal tonsil
ExplanationPharyngeal tonsil helps in immune function, lying behind the nasal cavity.
#4
Which muscle elevates the soft palate during swallowing to prevent food from entering the nasal cavity?
Levator veli palatini
ExplanationLevator veli palatini lifts the soft palate, closing off nasal passage during swallowing.
#5
Which structure marks the boundary between the nasopharynx and the oropharynx?
Soft palate
ExplanationSoft palate divides the nasopharynx from the oropharynx, aiding in swallowing.
#6
Which nerve innervates the stylopharyngeus muscle?
Glossopharyngeal nerve (CN IX)
ExplanationCN IX supplies motor fibers to the stylopharyngeus muscle.
#7
What is the main muscle involved in the swallowing process?
Pharyngeal constrictors
ExplanationPharyngeal constrictors contract sequentially to push food into the esophagus.
#8
Which cranial nerve is primarily responsible for the motor control of the pharynx?
Glossopharyngeal nerve (CN IX)
ExplanationCN IX innervates muscles involved in swallowing and provides sensory feedback.
#9
What is the function of the pharyngeal tonsil?
Filtering and trapping pathogens
ExplanationPharyngeal tonsil aids in immune response by capturing and destroying pathogens.
#10
Which artery supplies blood to the pharynx?
Ascending pharyngeal artery
ExplanationAscending pharyngeal artery provides blood to the structures of the pharynx.
#11
What is the role of the uvula?
Closing the nasopharynx during swallowing
ExplanationUvula moves upward to close off the nasopharynx during swallowing.
#12
Which muscle forms the superior boundary of the piriform recess in the laryngopharynx?
Aryepiglottic
ExplanationAryepiglottic muscle separates the piriform recess from the larynx.
#13
What is the name of the space between the base of the tongue and the epiglottis?
Vallecula
ExplanationVallecula serves as a reservoir for saliva and assists in preventing aspiration.
#14
What is the function of the cricopharyngeus muscle?
Closing the opening between the pharynx and esophagus
ExplanationCricopharyngeus muscle contracts to prevent reflux of food from the esophagus.
#15
Which nerve innervates the majority of the muscles involved in swallowing?
Vagus nerve (CN X)
ExplanationCN X provides motor and sensory innervation to most swallowing muscles.
#16
What is the primary function of the epiglottis during swallowing?
Closing off the trachea
ExplanationEpiglottis covers the trachea to prevent food or liquid from entering it during swallowing.
#17
Which structure is NOT part of the pharyngeal wall?
Pharyngeal recess
ExplanationPharyngeal recess is a space, not a structural component of the wall.