Final Exam - Digestive System (Part I) Flashcards
The oral cavity is formed by which structures?
lips, cheeks, palate, pharynx, tongue
The oral cavity is lined by what type of epithelium?
stratified squamous epithelium
Ameloblasts form __________.
enamel
Odontoblasts form __________.
dentin
Cementoblasts form __________.
cementum
What is indicated by ‘A’ in this section of the teeth?
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Tooth pulp
What is indicated by ‘B’ in this section of the teeth?
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odontoblasts
What is indicated by ‘C’ in this section of the teeth?
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dentin
What is indicated by ‘D’ in this section of the teeth?
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enamel
What is indicated by ‘E’ in this section of the teeth?
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ameloblasts
What are the most predominant cell types found in the periodontal ligament?
fibroblasts and macrophages
What structure is indicated by ‘A’?
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periodontal ligament
What structure is indicated by ‘B’?
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dentin
What structure is indicated by ‘C’?
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cementum
What structure is indicated by ‘D’?
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alveolar bone
What structure is indicated by ‘E’?
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epithelial rests
The tongue is lined by _________________ with specialized structures known as ___________.
The tongue is lined by keratinized stratified squamous epithelium with specialized structures known as papillae.
What is indicated by ‘A’ in this H&E section of the tongue?
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filiform papilla
What is indicated by ‘B’ in this H&E section of the tongue?
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epithelium
What is indicated by ‘C’ in this H&E section of the tongue?
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adipose tissue
What is indicated by ‘D’ in this H&E section of the tongue?
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lingual salivary glands
What is indicated by ‘E’ in this H&E section of the tongue?
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skeletal muscle
Identify ‘1’ in this section of mucosa
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lining epithelium
Identify ‘2’ in this section of mucosa
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lamina propria
contains cells of the immune system, including lymphocytes, plasma cells, and macrophages
Identify ‘3’ in this section of mucosa
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muscularis mucosae
What are we looking at in this section?
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Submucosa
loose collagenous supporting tissue that contains vessels, nerves, & a specialized nerve plexus
Identify the indicated layer.
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Tunica Adventitia -or- Tunica Serosa
If the organ is surrounded by other tissues, this layer is called a tunica adventitia
If the organ is suspended in the body cavity, it is called a tunica serosa.
Identify ‘A’ in this section of the canine esophagus.
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epithelium mucosae
Identify ‘B’ in this section of the canine esophagus.
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lamina muscularis mucosae
Identify ‘C’ in this section of the canine esophagus.
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tunica mucosa
Identify ‘D’ in this section of the canine esophagus.
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mucous glands
Identify ‘E’ in this section of the canine esophagus.
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tela submucosa
Identify ‘F’ in this section of the canine esophagus.
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skeletal muscle in tunica muscularis
Identify ‘A’ in this section of the reticulum.
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stratified squamous epithelium
Identify ‘B’ in this section of the reticulum.
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lamina propria mucosae
Identify ‘C’ in this section of the reticulum.
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tunica muscularis
cardiac glands empty into ___________
gastric pits
Identify this image.
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gastric pits
Identify ‘A’ in this H&E section of the cardiac glands of the canine stomach.
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mucous glands
Identify ‘B’ in this H&E section of the cardiac glands of the canine stomach.
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Lamina muscularis mucosae
Identify ‘C’ in this H&E section of the cardiac glands of the canine stomach.
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Tela submucosa
Identify ‘A’ in this H&E section of the canine fundic stomach.
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tunica mucosa
Identify ‘B’ in this H&E section of the canine fundic stomach.
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rugae
Identify ‘C’ in this H&E section of the canine fundic stomach.
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tela submucosa
Identify ‘D’ in this H&E section of the canine fundic stomach.
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tunica muscularis
____________ line the gastric pit and secrete mucous and bicarbonate ions to protect the epithelium from digestion by gastric juice (contains HCl and pepsin) present in the stomach lumen
Surface mucous cells
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____________ are found dispersed between the parietal cells; secret mucus (thinner than the secreted by surface mucous cells)
Neck mucous cells
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____________ are round cells that contain distinct eosinophilic cytoplasm and round, prominent nucleus; secrete HCl and intrinsic factor, needed for absorption of vitamin B12
Parietal (oxyntic) cells
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Identify the cells indicated by the arrows in this H&E section of the canine stomach
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Parietal (oxyntic) cells
____________ are found near the base of the gastric glands; basophilic contain basally positioned nucleus and prominent basophilic apical cytoplasm filled with many ribosomes; secrete pepsinogen (converted to pepsin in the acidic environment of the stomach)
Chief (peptic, zymogenic) cells
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Identify the cells indicated by the arrows in this H&E section of the canine stomach
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Chief cells
____________ are located primarily in the neck region; difficult to identify in routine H&E sections; undergo mitosis in the gland
Stem cells
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____________ are difficult to distinguish by light microscopy; several types are present; some secrete serotonin, gastrin, glucagon, and somatostatin, among other hormones
Neuroendocrine cells
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Identify ‘A’
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Pulp cavity (containing tooth pulp)
Identify the cells indicated by ‘B’
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odontoblasts
Identify the cells indicated by ‘A’
What is produced by these cells?
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Ameloblasts; enamel
Identify the cells indicated by ‘D’
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odontoblasts; dentin
Identify ‘B’
What is it produced by?
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enamel; ameloblasts
Identify ‘C’
What is it produced by?
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dentin
odontoblasts
Peyers patches are only found in the _______
ileum
Brunner’s glands are only found in the _________
duodenum
What are the various layers of the esophagus from internal to external?
- Mucosa (consisting of Epithelium, Lamina Propria, & Muscularis Mucosae)
- Submucosa
- Muscularis
- Adventitia
Mark Eventually Let Martha Slap My Aardvark
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enteroendocrine cells produce ________
gastrin