Lab 14 - Nasal Cavity Flashcards
(20 cards)
What is the name of this muscle as indicated by the arrow?
A) Levator palatini
B) Lymphoglandulæ
C) Levator scapulae
D) Occipital artery
A) Levator palatini
Explanation: The levator palatini (levator veli palatini) elevates the soft palate during swallowing. In the image, the indicated muscle is in the soft palate region, confirming this identification.
What is the name of the structure as specified by the arrow?
A) Frontal bone
B) Superior concha
C) Inferior concha
D) Middle concha
C) Inferior concha
Explanation: The arrow points to the lowermost scroll-like bone on the lateral nasal wall, which is the inferior nasal concha, a separate bone responsible for filtering and humidifying air.
What is the name of the structure as specified by the arrow?
A) Inferior concha
B) Superior concha
C) Ear bone
D) Middle concha
D) Middle concha
Explanation: The middle nasal concha is located above the inferior concha and below the superior concha. The image clearly shows a prominent structure in that middle position.
This is the groove of the (BLANK).
A) Hiatus Semilunaris
B) Inferior phrenic artery
C) Inferior oblique muscle
D) Nasal Cavity
A) Hiatus Semilunaris
Explanation: The groove beneath the middle nasal concha where sinuses drain is the hiatus semilunaris, serving as a key drainage point in the middle meatus.
The (BLANK) is the largest sinus of the skull and opens directly into the area indicated by the arrow.
A) Maxillary sinus
B) Nasal cavity
C) Middle concha
D) Oracle sinus
A) Maxillary sinus
Explanation: The maxillary sinus is the largest paranasal sinus and drains into the hiatus semilunaris, the area shown in the image.
What is the name of the structure as specified by the arrows?
A) Brachial plexus
B) Bulla Ethmoidalis
C) Brachial vein
D) Cranial nerve IX (9)
B) Bulla Ethmoidalis
Explanation: The bulla ethmoidalis is a bulging structure formed by middle ethmoid air cells, located just above the hiatus semilunaris.
What is the name of the structure as specified by the arrow?
A) Eardrum
B) Inferior concha
C) Superior concha
D) Middle concha
C) Superior concha
Explanation: The superior concha is the smallest and highest nasal concha. The arrow indicates this uppermost structure, identifying it as the superior concha.
Only one of the sinuses drains into the superior meatus, these are the (BLANK).
A) Parotid duct
B) Posterior ethmoidal cells
C) Pterygoideus
D) Middle concha
B) Posterior ethmoidal cells
Explanation: The posterior ethmoidal air cells are the only sinuses that drain into the superior meatus, located just beneath the superior concha.
What is this space known as (as shown by the arrow)?
A) Stylohyoid muscle
B) Sternocleidomastoid
C) Superior phrenic artery
D) Sphenoethmoidal recess
D) Sphenoethmoidal recess
Explanation: The sphenoethmoidal recess is located above the superior concha and is where the sphenoid sinus drains into the nasal cavity.
What does the structure in question 9 drain?
A) Sphenoidal sinus
B) Cranial nerve IX (9)
C) Inferior phrenic artery
D) Middle concha
A) Sphenoidal sinus
Explanation: The sphenoethmoidal recess drains the sphenoidal sinus into the nasal cavity. It is located posterior and superior to the superior concha.
What lies in this region here?
A) Middle concha
B) Pterygoideus
C) Pectoralis major
D) Pterygopalatine fossa
D) Pterygopalatine fossa
Explanation: This deep space behind the maxilla contains the pterygopalatine ganglion, branches of the maxillary nerve (CN V2), and the terminal part of the maxillary artery. It communicates with the nasal cavity, orbit, and palate.
What comes into this region?
A) Stomach
B) Nerves and vessels
C) Spleen
D) Middle concha
B) Nerves and vessels
Explanation: The pterygopalatine fossa receives branches of the maxillary nerve and artery, along with the pterygopalatine ganglion—critical neurovascular components that supply nearby facial and cranial structures.
What is this region being shown by the arrows?
A) Mucosa of the nasal cavity
B) Mucosa of the orbital cavity
C) Mucosa of the oral cavity
D) Mucosa of the fossa cavity
C) Mucosa of the oral cavity
Explanation: The dissection image shows the roof of the mouth lined with mucosa, confirming it is the oral cavity. It lies inferior to the nasal structures.
What is this region being shown by the arrows?
A) Mucosa of the orbital cavity
B) Mucosa of the fossa cavity
C) Mucosa of the nasal cavity
D) Mucosa of the oral cavity
C) Mucosa of the nasal cavity
Explanation: The arrows point to mucosa covering the turbinates and walls of the nasal cavity, which condition air through warming, moistening, and filtering.
In order to dissect the Pterygopalatine fossa, one must peel away this (BLANK) lining.
A) Mucosa
B) DNA
C) Skin
D) Protein
A) Mucosa
Explanation: The nasal mucosa must be carefully removed to expose the underlying structures of the pterygopalatine fossa for detailed dissection.
What is this region being shown by the arrows?
A) Epiglottis
B) Soft palate
C) Epidermis
D) Hard palate
D) Hard palate
Explanation: The image shows the bony roof of the mouth, formed by the maxilla and palatine bones, characteristic of the hard palate.
What is being exposed here in this region?
A) Maxillary sinus
B) Sternocleidomastoid
C) Maxillary artery
D) Cranial nerve XI (6)
A) Maxillary sinus
Explanation: The opened cavity shown is the maxillary sinus, an air-filled space in the maxilla that drains into the nasal cavity.
Which nerve is this to which the arrow is pointing?
A) Greater palatine nerve
B) Trigeminal nerve
C) Cranial nerve IX (9)
D) Lesser palatine nerve
A) Greater palatine nerve
Explanation: The nerve shown runs through the hard palate area and is responsible for innervating the mucosa of the hard palate, consistent with the greater palatine nerve.
What is this region being shown by the arrows?
A) Sphenoid sinus
B) Superior phrenic artery
C) Cranial nerve IX (9)
D) Middle concha
A) Sphenoid sinus
Explanation: The arrows point to a hollow, air-filled chamber in the body of the sphenoid bone, identifying it as the sphenoid sinus, which drains into the sphenoethmoidal recess.
What is the name of the structure as specified by the arrow?
A) Cranial nerve XII (12)
B) Middle concha
C) Infraorbital nerve
D) Ganglion
C) Infraorbital nerve
Explanation: The nerve courses through the floor of the orbit and emerges on the face through the infraorbital foramen, making it the infraorbital nerve, a branch of CN V2.
