Lecture 8

Question 1

What gland produces only serous secretions and what is the name of the duct that the serous fluid travels along?

Answer 1

Parotid duct and the parotid gland

Question 2

What gland produces a mix of both mucous and serous secretions?

Answer 2

Mandibular gland

Question 3

What gland releases predominantly mucous secretions?

Answer 3

Sublingual gland

Question 4

Describe the appearance of the parotid gland:

Answer 4

very lobulated

Question 5

Describe the appearance of the mandibular gland

Answer 5

much more encapsulated in appearance

Question 6

The temperomandibular joint is an articulation between what two processes?

Answer 6

Condylar process and the mandibular fossa

Question 7

What nerve innervates all of the masticatory muscles?

Answer 7

all innervated by the mandibular nerve

Question 8

What two bones does the temporalis muscle connect and what is its action?

Answer 8

Temporalis has a scissor like action. Connects temporal fossa to the coronoid process

Question 9

What is the function of the masseter muscle? and what two processes does it connect

Answer 9

Responsible for the lateral grinding movement. Connects the maxilla and zygomatic arch to the lateral ramus

Question 10

What is the function of the pterygoid muscle and what two processes does it connect?

Answer 10

Connects the underside of the skull to the median ramus and the angular process. Responsible for closing the jaw and for medial movement

Question 11

What is the function of the diagastric muscle and what two processes does it connect?

Answer 11

Only muscle that is able to forcibly open the jaw. Innervated by the rostral part of the mandibular nerve and the caudal facial nerve

Question 12

Describe the difference in occlusion and chewing between carnviors and omnivors:

Answer 12

Question 13

Describe the oropharynx:

Answer 13

Caudal to the palatoglossal arches and ends at the epiglottis. Entered by the isthmus faucium. “Fauces” hallway at the junction between these two processes

Question 14

Describe the laryngopharynx:

Answer 14

Caudal to the free edge of soft palate and palatopharyngeal arches

Question 15

Describe the process involved in deglutation:

Answer 15

1. Bolus is formed in the back of the tongue
2. Bolus is pressed against the hard palate squeezed caudally
3. The bolus enters the oropharynx and stimulates reflex + and then the tongue is jerked backwards propelling the bolus further back caudally
4. The hyoid apparatus is swung forward bringing the pharynx to meet the bolus
5. The pharynx dilates to receive the bolus of food
6. Pharyngeal constrictors contract sequentially moving the bolus caudally
7. Tongue relaxes and returns to normal position
8. The cranial oesophageal sphincter relaxes
9. Bolus is propelled down the oesophagus by primary peristaltic wave
10. The hyoid apparatus returns to it’s resting position