oral cavity anatomy

Question 1

1. Which of the following is NOT a boundary of the oral cavity?
   a) Lips
   b) Cheeks
   c) Diaphragm
   d) Soft palate

Answer 1

Answer: c) Diaphragm

Question 2

2. What structure separates the oral cavity from the pharynx?
   a) Cheeks
   b) Hard palate
   c) Isthmus faucium
   d) Lips

Answer 2

Answer: c) Isthmus faucium

Question 3

3. Which of the following is a function of the soft palate in the oral cavity?
   a) Forms the upper boundary of the oral cavity
   b) Separates the oral cavity from the nasal cavity
   c) Seals off the nasopharynx during swallowing
   d) Acts as a boundary between the oral and nasal cavities

Answer 3

Answer: c) Seals off the nasopharynx during swallowing

Question 4

4. Which part of the oral cavity forms the anterior boundary?
   a) Cheeks
   b) Lips
   c) Hard palate
   d) Oral diaphragm

Answer 4

Answer: b) Lips

Question 5

5. The oral diaphragm forms a boundary for the oral cavity, but what is its primary function?
   a) It provides a separation between the oral cavity and the pharynx
   b) It supports the movement of the tongue
   c) It separates the oral cavity from the rest of the throat
   d) It helps in mastication

Answer 5

Answer: a) It provides a separation between the oral cavity and the pharynx

Question 6

1. Which of the following is part of the vestibule of the oral cavity?
   a) Hard palate
   b) Lips and cheeks
   c) Floor of the mouth
   d) Alveolar arches

Answer 6

Answer: b) Lips and cheeks

Question 7

2. The oral cavity proper includes all of the following EXCEPT:
   a) Alveolar arches
   b) Teeth and gums
   c) Oropharyngeal isthmus
   d) Lips and cheeks

Answer 7

Answer: d) Lips and cheeks

Question 8

3. Which structure forms the boundary between the oral cavity proper and the oropharynx?
   a) Alveolar arches
   b) Oropharyngeal isthmus
   c) Floor of the mouth
   d) Soft palate

Answer 8

Answer: b) Oropharyngeal isthmus

Question 9

4. What is found in the floor of the oral cavity proper?
   a) Teeth and gums
   b) Alveolar arches
   c) Hard and soft palates
   d) Tongue and salivary glands

Answer 9

Answer: d) Tongue and salivary glands

Question 10

5. Which of the following structures is a boundary of both the oral cavity proper and the vestibule?
   a) Gums and teeth
   b) Oropharyngeal isthmus
   c) Alveolar arches
   d) Floor of the mouth

Answer 10

Answer: a) Gums and teeth

Question 11

1. The vestibule is continuous with the oral cavity proper behind which teeth?
   a) Incisors
   b) Canine teeth
   c) Premolars
   d) Third molars

Answer 11

Answer: d) Third molars

Question 12

2. Where is the retromolar space located in relation to the teeth?
   a) In front of the first molars
   b) Behind the third molars
   c) Above the incisors
   d) Between the canine and premolar teeth

Answer 12

Answer: b) Behind the third molars

Question 13

3. The vestibule becomes continuous with the oral cavity proper when the teeth are:
   a) Separating
   b) Apposed (touching)
   c) Crooked
   d) Inactive

Answer 13

Answer: b) Apposed (touching)

Question 14

4. What is the primary function of the retromolar space in the oral cavity?
   a) It separates the oral cavity from the nasal cavity
   b) It serves as the boundary between the vestibule and the oral cavity proper
   c) It is the space behind the third molars
   d) It helps in speech formation

Answer 14

Answer: b) It serves as the boundary between the vestibule and the oral cavity proper

Question 15

5. The continuous connection between the vestibule and the oral cavity proper is located in which area?
   a) The upper jaw
   b) The retromolar space behind the third molars
   c) The tongue
   d) The palatal arch

Answer 15

Answer: b) The retromolar space behind the third molars

Question 16

1. Which of the following structures lies between the skin and mucosa of the lips?
   a) Orbicularis oris
   b) Buccinator
   c) Masseter
   d) Temporalis

Answer 16

Answer: a) Orbicularis oris

Question 17

2. What type of tissue is found in the lips between the orbicularis oris muscle and the mucosa?
   a) Bone
   b) Fibro-adipose connective tissue
   c) Cartilage
   d) Dense fibrous tissue

Answer 17

Answer: b) Fibro-adipose connective tissue

Question 18

3. Where is the vermilion border located?
   a) Between the lips and teeth
   b) At the junction between the skin and mucosa of the lips
   c) Between the upper and lower lips
   d) Between the lips and gums

Answer 18

Answer: b) At the junction between the skin and mucosa of the lips

Question 19

4. Which of the following is NOT found in the lips?
   a) Labial salivary glands
   b) Orbicularis oris muscle
   c) Buccal fat pad
   d) Labial vessels and nerves

Answer 19

Answer: c) Buccal fat pad

Question 20

5. What does the skin of the lips transition into at the vermilion border?
   a) Oral cavity mucosa
   b) Gum tissue
   c) Cheek lining
   d) Buccal mucosa

Answer 20

Answer: a) Oral cavity mucosa

Question 21

1. What is the labial commissure?
   a) The area between the upper and lower lip
   b) The corner of the mouth
   c) The groove above the upper lip
   d) The line where the lips meet the gums

Answer 21

Answer: b) The corner of the mouth

Question 22

3. The nasolabial sulcus forms the lateral boundary of which lip?
   a) Lower lip
   b) Upper lip
   c) Both upper and lower lips
   d) Neither upper nor lower lip

Answer 22

Answer: b) Upper lip

Question 23

2. Which of the following is a shallow vertical groove found on the upper lip?
   a) Mentolabial sulcus
   b) Philtrum
   c) Nasolabial sulcus
   d) Labial commissure

Answer 23

Answer: b) Philtrum

Question 24

4. Which of the following defines the inferior boundary of the lower lip?
   a) Labial commissure
   b) Mentolabial sulcus
   c) Philtrum
   d) Nasolabial sulcus

Answer 24

Answer: b) Mentolabial sulcus

Question 25

1. Which of the following is the correct term for the connective tissue band found in the center of the lips? a) Labial sulcus b) Labial frenulum c) Nasolabial fold d) Mentolabial sulcus

Answer 25

Answer: b) Labial frenulum

Question 26

5. Where is the philtrum located? a) Below the lower lip b) Between the upper lip and nose c) At the corner of the mouth d) Between the gums and the teeth

Answer 26

Answer: b) Between the upper lip and nose

Question 27

2. The superior and inferior labial arteries are branches of which main artery? a) Carotid artery b) Subclavian artery c) Facial artery d) Maxillary artery

Answer 27

Answer: c) Facial artery

Question 28

2. The transverse facial artery, a branch of which artery, supplies blood to the cheeks? a) Maxillary artery b) Subclavian artery c) Superficial temporal artery d) Facial artery

Answer 28

Answer: c) Superficial temporal artery

Question 29

4. The lymphatic drainage of the lips primarily involves which lymph nodes? a) Axillary and inguinal lymph nodes b) Submandibular and submental lymph nodes c) Cervical and thoracic lymph nodes d) Popliteal and iliac lymph nodes

Answer 29

Answer: b) Submandibular and submental lymph nodes

Question 30

1. Which of the following tissues are found in the cheeks? a) Skeletal muscles, adipose tissue, fibrous connective tissue, vessels, nerves, and buccal salivary glands b) Bone, cartilage, and skin c) Smooth muscle, cartilage, and synovial tissue d) Only skin and muscles

Answer 30

Answer: a) Skeletal muscles, adipose tissue, fibrous connective tissue, vessels, nerves, and buccal salivary glands

Question 31

3. Which of the following veins drains the blood from the lips? a) Jugular vein b) Submental vein c) Temporal vein d) Retromandibular vein

Answer 31

Answer: b) Submental vein

Question 32

5. Which of the following nerves provide sensory innervation to the lips? a) Vagus nerve b) Maxillary and mandibular nerves c) Optic nerve d) Facial nerve

Answer 32

Answer: b) Maxillary and mandibular nerves

Question 33

3. Which arteries, besides the transverse facial artery, supply the cheeks? a) Buccal artery and infraorbital artery b) Carotid artery and radial artery c) Femoral artery and subclavian artery d) Internal jugular artery and brachiocephalic artery

Answer 33

Answer: a) Buccal artery and infraorbital artery

Question 34

5. The sensory innervation of the cheeks is provided by which nerves? a) Vagus and facial nerves b) Maxillary and mandibular nerves c) Optic and glossopharyngeal nerves d) Trigeminal and accessory nerves

Answer 34

Answer: b) Maxillary and mandibular nerves

Question 35

4. Which lymph nodes are responsible for the lymphatic drainage of the cheeks? a) Cervical and axillary lymph nodes b) Submandibular and parotid lymph nodes c) Inguinal and femoral lymph nodes d) Popliteal and iliac lymph nodes

Answer 35

Answer: b) Submandibular and parotid lymph nodes

Question 36

1. The gums (gingivae) are primarily composed of which type of tissue? a) Cartilage b) Dense, vascular fibrous tissue c) Loose connective tissue d) Smooth muscle tissue

Answer 36

Answer: b) Dense, vascular fibrous tissue

Question 37

2. The gums are firmly attached to which structures? a) Mucosal lining of the oral cavity and teeth b) Cement at the necks of the teeth and bone of the adjacent alveolar process c) Palate and cheeks d) Tongue and palate

Answer 37

Answer: b) Cement at the necks of the teeth and bone of the adjacent alveolar process

Question 38

4. The lymphatic drainage of the gums is primarily into which lymph nodes? a) Cervical and thoracic lymph nodes b) Submandibular and submental lymph nodes c) Axillary and inguinal lymph nodes d) Popliteal and iliac lymph nodes

Answer 38

Answer: b) Submandibular and submental lymph nodes

Question 39

3. Which arteries supply blood to the gums (gingivae)? a) Facial artery and its superior and inferior labial branches b) Maxillary artery c) Subclavian and carotid arteries d) External jugular and brachiocephalic arteries

Answer 39

Answer: a) Facial artery and its superior and inferior labial branches

Question 40

5. Which nerves provide sensory innervation to the gums? a) Optic and facial nerves b) Maxillary and mandibular nerves c) Vagus and glossopharyngeal nerves d) Trigeminal and accessory nerves

Answer 40

Answer: b) Maxillary and mandibular nerves

Question 41

1. The palatine raphe is a zone lacking submucosa that runs in which direction on the hard palate? a) Transversely b) Anteroposteriorly c) Diagonally d) Laterally

Answer 41

Answer: b) Anteroposteriorly

Question 42

1. The hard palate is primarily composed of which structures? a) Palatine processes of the maxillae and horizontal plates of the palatine bones b) Only the maxillae c) Only the palatine bones d) The nasal septum and maxillary bones

Answer 42

Answer: a) Palatine processes of the maxillae and horizontal plates of the palatine bones

Question 43

2. Which portion of the hard palate is formed by the palatine processes of the maxillae? a) 1/4 anterior part b) 1/2 posterior part c) 2/3 anterior part d) Entire surface

Answer 43

Answer: c) 2/3 anterior part

Question 44

3. The soft palate is described as a: a) Rigid structure firmly attached to the maxillae b) Mobile flap suspended from the posterior border of the hard palate c) Fixed bony structure that provides support to the tongue d) Non-mobile membrane lining the nasal cavity

Answer 44

Answer: b) Mobile flap suspended from the posterior border of the hard palate

Question 45

5. The uvula is located at the posterior border of which structure? a) Hard palate b) Soft palate c) Tongue d) Maxilla

Answer 45

Answer: b) Soft palate

Question 46

4. What is the uvula? a) A bony structure at the base of the hard palate b) A median conical process that projects downwards from the posterior border of the soft palate c) A muscle located at the base of the tongue d) A gland located behind the soft palate

Answer 46

Answer: b) A median conical process that projects downwards from the posterior border of the soft palate

Question 47

2. What is located at the anterior end of the palatine raphe on the hard palate? a) Incisive papilla b) Uvula c) Maxillary ridge d) Palatine tonsil

Answer 47

Answer: a) Incisive papilla

Question 48

3. The incisive papilla covers which anatomical feature of the hard palate? a) Maxillary ridge b) Incisive fossa c) Palatine bone d) Rugae

Answer 48

Answer: b) Incisive fossa

Question 49

4. What structure runs laterally from the palatine raphe in the anterior part of the hard palate? a) Incisive papilla b) Transverse ridges or rugae c) Soft palate d) Buccal fat pad

Answer 49

Answer: b) Transverse ridges or rugae

Question 50

5. The rugae on the hard palate are composed of which type of tissue? a) Smooth muscle b) Dense connective tissue c) Bone tissue d) Elastic cartilage

Answer 50

Answer: b) Dense connective tissue

Question 51

2. What structure separates the oral cavity from the pharynx? a) Cheeks b) Hard palate c) Isthmus faucium d) Lips

Answer 51

Answer: c) Isthmus faucium