Histo Exam 3

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components of saliva

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1

components of saliva

glycoproteins (mucin), proteins (gustin and enzymes), ions, immunoglobulins

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<p><span style="font-family: Source Sans Pro, sans-serif">Which of the following sensory mechanoreceptors can be seen in the histological image?</span></p>

Which of the following sensory mechanoreceptors can be seen in the histological image?

pacinian corpuscle

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3
<p>what type of burn is this?</p>

what type of burn is this?

3rd degree, full thickness

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4
<p><span style="font-family: Source Sans Pro, sans-serif">which of the following skin regions has been infiltrated by inflammatory cells (lymphocytes)?</span></p>

which of the following skin regions has been infiltrated by inflammatory cells (lymphocytes)?

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5
<p>which junctional complex of the epidermis has been impacted?</p>

which junctional complex of the epidermis has been impacted?

desmosomes

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6
<p>what is the pathological condition? on A</p>

what is the pathological condition? on A

basal cell carcinoma

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7
<p>what do the numbers represent?</p>

what do the numbers represent?

1) Corneum 2) Lucidum 3) Granulosum 4) Spinosum 5) Basale

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8
<p>where is this tissue located?</p>

where is this tissue located?

esophagus

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9
<p>where is this tissue located?</p>

where is this tissue located?

middle of esophagus. notice presence of skeletal and smooth muscle

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10
<p>what do the letters represent?</p>

what do the letters represent?

A: mucosa B: submucosa C: muscularis externa D: adventita/serosa

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<p>what organ is this from? and what are the numbers</p>

what organ is this from? and what are the numbers

stomach. 1) gastric pit 2) gastric gland star is the muscularis mucosa, 4) submucosa

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<p>what is the pathological condition?</p>

what is the pathological condition?

stomach ulcer

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15

main function of saliva

facilitates swallowing, moisten oral epithelium, neutralize plaque acid, oral immunity

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16

exocrine glands

transport via ducts

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17

serous cells

high protein, low carb. stain deeply

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18

serous cells appearance

triangle profile, eosinophilic secretory granules at apex. basophilic nucleus

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19
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mucous cells

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<p>what type of cells are shown?</p>

what type of cells are shown?

mucous cells

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21
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serous cells

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22
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serous cells

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mucous cells

low protein, high carb. greater emphasis on lubrication

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24

mucous cells appearance

pale and eosinophilic. pyramidal, wide base w/ nucleus

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25
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mucous cells

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26

endpieces

collection of salivary cells with just the saliva producing cells in aggregates

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27

acinus

group of serous cells. resembles a raspberry. apical surfaces of cells face lumen. where acinus ends, exocrine ducts begin

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tubules

group of mucous cells

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29

outer layer of acinus

basal membrane that secludes from surrounding tissues

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serous acini

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mucous tubules

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serous acini

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33
<p>what is the structure?</p>

what is the structure?

mixed mucous and serous

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34
<p>what are the structures?</p>

what are the structures?

lobe and lobule

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35

the stroma

outer connective tissue capsule (beige). surrounds and penetrates salivary tissues. divides gland into lobes and lobules

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36
<p>what is the structure?</p>

what is the structure?

mucous tubules

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37
<p>what is the structure?</p>

what is the structure?

parotid lobule

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38
<p>what is the structure?</p>

what is the structure?

dense ct parotid capsule

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39

intralobular

ducts found within lobules, within parenchyma. can be intercalated or striated

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40

interlobular

leaves parenchyma. excretory duct aka collecting duct

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41

order of duct movement

intercalated disk → striated duct → excretory duct

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intercalated disk

smaller than acinus/tubule. short cuboidal cells. nuclei fill cells. narrow lumen

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43

striated duct

tall columnar cells. bands of mitochondria. central nuclei, wide lumen

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44
<p>what is the structure?</p>

what is the structure?

intercalated duct

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45
<p>what is the structure?</p>

what is the structure?

striated duct

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46

saliva initially _____ to blood plasma, then becomes _______

isotonic, hypertonic

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47
<p>what is the structure?</p>

what is the structure?

excretory ducts

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48

excretory ducts

within CT, outside of lobes. distinct columnar epithelium. sometimes stratified, sometimes pseudostratified

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49
<p>what is the structure?</p>

what is the structure?

parotid gland

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50

parotid gland

almost completely serous

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51

submandibular gland

serous and mucous cells. telltale indicator is demilunes which are serous crescent moons adjacent to mucous tubules

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52
<p>what is the structure?</p>

what is the structure?

demilune of submandibular gland

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53
<p>what is the structure?</p>

what is the structure?

mucous tubule

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54
<p>what is the structure?</p>

what is the structure?

mucous tubules with serous demilunes

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55
<p>what is the structure?</p>

what is the structure?

mucous tubules with serous demilunes

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56
<p>what is the structure?</p>

what is the structure?

mucous tubules with serous demilunes

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57
<p>what type of gland?</p>

what type of gland?

sublingual gland

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58

sublingual gland

exclusively mucous cells

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59

myoepithelial cells

surround acini and intercalated disk. stellate cells w processes. flat nuclei, stained brown. provides contractile support and innervated by sympathetic and parasympathetic

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<p>what is the structure?</p>

what is the structure?

myoepithelial cells

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<p>what is the structure?</p>

what is the structure?

elongated nucleus of myoepithelial cells

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<p>what is the structure?</p>

what is the structure?

myoepithelial cell on a mucous tubule

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63
<p>what is the structure?</p>

what is the structure?

myoepithelial cells

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64
<p>what is the gland?</p>

what is the gland?

parotid gland

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65
<p>what type of duct?</p>

what type of duct?

striated duct

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66
<p>what is the structure?</p>

what is the structure?

striated to the left, intercalated duct on the right

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67
<p>identify the duct</p>

identify the duct

excretory duct

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68
<p>what ducts are pictured?</p>

what ducts are pictured?

intercalated ducts

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69

what is the hardest substance in the body?

teeth

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70

enamel rods

extend from DEJ to outer surface of crown. diameter inc towards outer surface

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71

what is bw rods?

interrod enamel

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72

dentin

rigid (harder than bone and cementum), elastic (softer than enamel). 70% hydroxyapatite, 20% collagen, 10% water. protects the whole tooth structure unlike enamel. can regenerate

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tubules

pulpal surface to dentinoenamel and DEJ. contain processes of odontoblasts and dentinal fluid. sigmoid course, aka primary curve

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primary dentin

first to form. 2 subdivisions

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mantle dentin

outermost later of primary. at DEJ. larger diameter collagen fibrils here

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secondary dentin

borders pulp. bulk of primary dentin. more mineralized than mantle. s curve found here

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predentin

innermost layer. non mineralized. adjacent to odontoblasts

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tertiary dentin

reparative response to damage (cavities, restorative procedures). more rapid=more irregular

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pulp

specialized connective tissue. predominantly fibroblasts (GAGs, collagen fibers). support matrix for neurovasculature

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cell free zone nerves

nerves, capillaries

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cell rich zone

fibroblasts, leucocytes

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parietal layer

nervous plexus. unmyelinated axons may terminate among odontoblasts or continue into tubules

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83

where is there a pathway for infection?

root canals- connect pulp chamber with periodontal tissues

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84

cementum

thin layer of calcified tissue lining root. seals surface of root dentin and open dentin tubules. softer than dentin. large collagen content

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85

acellular cementum

adjacent to root, seems structureless

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86

cellular cementum

found closer to root apex. resembles bone, cementoblasts are trapped in matrix then turn to cementocytes. have canaliculi

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87

PDL

dense fibrous connective tissue. bw root and alveolus. continuous w gingiva and dental pulp

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88

PDL functions

resists displacing forces, maintains tooth position, repairs alveolar bone and cementum, provides feedback

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89

alveolar bone

tooth socket, hold teeth in place, respond to changes in teeth. mediate forces applied by mastication. spongy bone

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90

cortical layer of bone

lamina dura. lines socket and is where PDL attaches

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91

free gingiva

narrow rim of mucosa, not bound to hard tissue

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92

free gingival groove

border structure bw attached and free

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93

attached gingiva

directly bound to tooth and alveolar bone. masticatory mucosa: comes into contact w food. keratinized epithelium. dense, relatively avascular lamina propria. long, narrow pegs

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sulcular gingiva

parakeratinized epithelium

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95

junctional epithelium

thin, nonkeratinized

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96

alveolar mucosa

extends from border of gingiva to buccal and labial sulci. thin, nonkeratinized epithelium

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97

respiratory surface epithelium

Pseudostratified ciliated columnar. contain goblet cells that secrete mucous

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98

lamina propria of respiratory surface

arteries, extensive venous plexus

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99

masticatory epithelium

protective and masticatory function. resists abrasion, extreme temp, and laceration

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100

epithelial layers of hard palate

basale, spinosum, granulosum, corneum

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