Lecture 7-Salivation and Swallowing Flashcards
What are the functions of saliva?
- lubrication of food and structures in mouth
- keep teeth healthy
- transmit disease eg rabies
- contains lysozyme to destroy bacteria in food
- taste molecules
- first aid in digestion
What are the components of saliva?
- mostly water
- K+ and HCO3-
- mucins for lubrication
- amylase
- lingual lipase
- immune proteins
Which gland produced 3-5% of saliva?
Sublingual gland
What type of secretions does the sublingual gland produce?
Mucous-like secretions
What type of secretions does the submandibular gland produce?
Mixed serous and mucous secretions
What type of secretions does the parotid gland produce?
Serous saliva, watery solution with enzymes
Which salivary gland is the largest and most lateral?
Parotid
Which muscle does the parotid duct pass through?
Buccinator
Which nerve innervates the parotid gland?
CN IX
True or false: the submandibular gland sits above the mylohoid muscle in the floor of the mouth
FALSE - sits below. Sublingual gland sits above
Is the submandibular gland located medially or laterally in the floor of the mouth?
Medially (Medial, subMandibular. subLingual is Lateral)
Which nerve innervates the submandibular and sublingual glands?
Chorda tympani (branch of CN VII)
Which drugs cause xerostomia?
Anti-muscarinics
What is xerostomia?
Dry mouth
What are the 3 stages of swallowing?
Oral phase
Pharyngeal phase
Oesophageal phase