Intermediate Lips Quiz

Q1. Which trigeminal division carries sensory fibers from the upper lip?

• Ophthalmic division, V1
• No trigeminal division
• Mandibular division, V3
• Maxillary division, V2

Q2. Which trigeminal division carries sensory fibers from the lower lip?

• Maxillary division, V2
• Facial nerve, VII
• Ophthalmic division, V1
• Mandibular division, V3

Q3. Where do the superior and inferior labial arteries generally course?

• Within the enamel of the teeth
• Inside the nasal septal cartilage
• Deep to the vertebral column
• Between orbicularis oris and the labial mucosa

Q4. Why does the vermilion appear red?

• It contains red skeletal muscle exposed to air
• It is covered by respiratory epithelium
• It contains no blood vessels
• Superficial capillaries are visible through relatively thin epithelium

Q5. Which muscle blends with orbicularis oris at the angle of the mouth and helps keep food between the teeth?

• Buccinator
• Posterior digastric
• Temporalis
• Levator scapulae

Q6. What is the oral commissure?

• The lateral junction of the upper and lower lips
• The opening of the parotid duct
• The posterior edge of the tongue
• The midline of the hard palate

Q7. Which lymph nodes commonly receive lymph from the central part of the lower lip?

• Retropharyngeal lymph nodes
• Occipital lymph nodes
• Preauricular lymph nodes
• Submental lymph nodes

Q8. Which lymph nodes commonly receive lymph from the upper lip and lateral parts of the lower lip?

• Popliteal lymph nodes
• Posterior mediastinal lymph nodes
• Submandibular lymph nodes
• Deep inguinal lymph nodes

Q9. What is the relationship of orbicularis oris to muscles of facial expression around the mouth?

• Orbicularis oris is isolated from all other facial muscles
• Several facial muscles interlace with orbicularis oris
• It attaches only to the hyoid bone
• It is a muscle of mastication supplied by V3

Q10. Which tissue transition occurs from the outer to inner lip?

• Synovium to periosteum to enamel
• Skin to vermilion to oral mucosa
• Respiratory mucosa to bone to skin
• Bone to cartilage to tendon