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Hepatitis B > Salivary glands > Flashcards

Salivary glands Flashcards

1
Q

What type of saliva is the parotid gland

A

Serous - watery

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2
Q

Different lobes of the parotid gland

A

Superficial, deep and glenoid

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3
Q

What duct is associated with the parotid gland

A

Stensons
Emerges from the anterior edges passes through the master and pierces the buccinator and open into the mouth near U7 molar

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4
Q

Secretomotor parasympathetic fibres to parotid gland

A

Glossopharyngeal synapses with otic ganglion and is then carried by auriculotemporal branch of mandibular

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5
Q

Posterior border of parotid gland

A

Mastoid process and sternocleidomastoid

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6
Q

Deep border of parotid gland

A

Styloid process and carotid sheath

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7
Q

Superior border of parotid gland

A

Zygomatic branch

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8
Q

Anterior border of parotid gland

A

Masseter muscle

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9
Q

Important structures that pass through the parotid gland

A

Facial nerve
External carotid artery - ascends gives rise to the posterior auricular artery and divides into its two terminal branches
Retromandibular vein - formed in the pg by the superficial temporal and maxillary veins

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10
Q

Sympathetic innervation of the parotid gland

A

Superior cervical ganglion - part of the paravertebral chain - fibres travel along ECA to parotid gland

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11
Q

What type of saliva SM gland

A

Mixed gland

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12
Q

Superior border of SM gland

A

Inferior border of mandible

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13
Q

Anterior border of SM gland

A

Anterior belly of digastric

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14
Q

Posterior border of SM gland

A

Posterior belly of digastric

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15
Q

Vasculature of the SM gland

A

Submental artery

Venous drainage: facial vein and sublingual vein

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16
Q

Parasympathetic innervation of SM gland

A

Innervates from superior salivary nucleus
Fibres travel via the Chorda tympani branch of the facial nerve, it then unifies with the lingual branch - synapses at the sm ganglion

17
Q

Sympathetic innervation of SM gland

A

Superior cervical ganglion

18
Q

What type of saliva is SL gland

19
Q

Medial border of SL gland

A

Genioglossus muscle

20
Q

Lateral border of SL gland

21
Q

Parasympathetic innervation of SL

A

Innervates from superior salivary nucleus fibres travel via the Chorda tympani branch of the facial nerve it then unifies with the lingual branch - - synapses at the sm ganglion

22
Q

Sympathetic ganglion of the SL ganglion

A

Superior cervical ganglion

23
Q

Flow rate unstimulated

A

0.25- 0.35 - mostly submandibular

24
Q

Flow rate stimulated

A

1.0 - 3.0 - mostly parotid

25
Q

2 types of acing cells

A

Mucous and serous

26
Q

What does the secretory unit consist of

A 
Acinus - serious, mucous or mixed 
Myoepithelial cells 
Intercalated duct 
Striated duct 
Excretory duct
27
Q

What does the striated duct contain

A

Mitochondria

Participates in Na+ and Cl- reabsorption and K+ and HCO3- secretion

28
Q

What are serous demilune

A

Clear mucous acinar cells with flattened nuclei on the outside edge

29
Q

Epithelium of striated ducts

A

Simple columnar

30
Q

Epithelium of intercalated ducts

A

Simple cuboidal

31
Q

Epithelium of excretory ducts

A

Stratified cuboidal

32
Q

Function of myoepithelial cells

A

Contractile function

Help in expelling secretions from the lumen of secretory units and facilitate the movement of saliva in salivary ducts

33
Q

Unstimulated flow

A

PG - 20%
SM - 65%
SL - 10%
Minor glands - 5%

34
Q

Stimulated flow

A

PG - 65%
SM - 20%
SL- 10%
Minor glands - 5%

35
Q

Average daily flow of saliva

A

1.0. - 1.5 L

36
Q

Is saliva isotonic

A

Initially isotonic but becomes hypotonic as it travels through the ducts

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