32 Questions
What is the characteristic of the wall of the digestive tract?
Made up of four main layers: the mucosa, submucosa, muscularis, and serosa
What type of epithelium covers the tongue?
Non-keratinizing stratified squamous epithelium
What type of glands are found in the submucosa of the tongue?
Mucous and serous glands
What is the characteristic of the oral mucosa lining the lip and cheek?
Non-keratinized epithelium with salivary glands
What type of papillae are found on the dorsal surface of the tongue and have keratinized epithelium?
Filiform papillae
What is the name of the salivary glands found in the submucosa of the tongue and associated with the circumvallate papillae?
Von Ebner's glands
What is the primary function of intrinsic factor in the gastric juice?
To facilitate the absorption of vitamin B12
Which type of cells produces pepsinogen in the gastric glands?
Chief cells
What is the main function of the smooth muscle fibers in the gastric glands?
To support the structure of the gastric glands
Which of the following is NOT a component of gastric juice?
Bicarbonate
What is the role of the vagus nerve in regulating gastric secretion?
It regulates the neural activity that controls gastric secretion
What is the location of the lymphoid cells and nodules in the gastric mucosa?
In the lamina propria between the gastric glands
What is the average daily volume of saliva secreted in the human body?
1,000 ml/day
Which of the following glands is responsible for producing the most saliva?
Submandibular Glands
What is the primary function of the esophagus?
To transport food and liquid from the pharynx to the stomach
Which of the following ions is NOT typically found in saliva?
Calcium
What is the pH of saliva in the human body?
6.5
What is the name of the cell type that plays a role in the contraction of salivary glands?
Myoepithelial Cell
What is the primary function of the stomach?
Hormone production and food digestion
What is the characteristic of the stomach lining when empty?
Rugae are longitudinally directed folds that flatten when the stomach is filled with food
What is the function of the gastric glands in the stomach mucosa?
To deliver their secretions into the bases of the gastric pits
What is the characteristic of the surface mucous cells in the gastric mucosa?
They produce a thick, viscous mucus
What is the term for the small circular or ovoid invaginations of the epithelial in the stomach mucosa?
Foveolae
What is the type of epithelium found in the gastric mucosa?
Simple columnar epithelium
What is the primary function of the pyloric sphincter muscle in the pyloric region of the stomach?
To regulate the passage of food into the duodenum
What is the significance of the thick wall in the pyloric region of the stomach?
It is due to the presence of the pyloric sphincter muscle
What is the primary purpose of taking antral, incisura, and corpus biopsies in the clinical case?
To determine the region of origin of each biopsy
What is the morphology of the structures revealed by the silver stain of the patient's gastric mucosa?
Small, curved rods
What is the relationship between the structures revealed by the silver stain and the patient's chronic gastritis?
The structures are a cause of the chronic gastritis
What is the location of the muscularis externa in the stomach?
Inner circular layer
What is the function of the glands in the stomach?
To produce digestive enzymes
What is the significance of the contraction of the strands in the stomach?
It facilitates the emptying of the glands
Explore the general structure of the digestive tract, including its common characteristics and components, as well as the anatomy of the tongue. Learn about the different layers of the digestive tract wall and the unique features of the tongue.
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