18 Questions
What is the main function of the gastric glands in the stomach?
To secrete digestive enzymes
What type of cells primarily make up the walls of the gastric pit?
Mucous cells
What is the approximate increase in surface area of the small intestine due to the combination of circular folds, villi, and microvilli?
600-fold
How does the stomach protect itself from self-digestion?
By secreting a thick coat of bicarbonate-rich mucus
Which part of the small intestine is responsible for the absorption of bile acids and vitamin B12?
Ileum
What is the main function of the small intestine in the digestive system?
To absorb nutrients
What is the outermost layer of the gastrointestinal tract composed of?
Serosa
What is the name of the junction that connects the small intestine to the large intestine?
Ileocecal sphincter
What are the two main types of gastric glands in the stomach mucosa?
Oxyntic and pyloric glands
Which of the following neural plexuses is located in the submucosa layer of the gastrointestinal tract?
Meissner’s plexus
What is the main function of the duodenum in the small intestine?
Neutralisation of protein, lipid, and carbohydrate digestion
What is the main function of the mucosa layer in the gastrointestinal tract?
Absorption of nutrients and secretion of hormones
What percentage of total saliva secretions is contributed by the major salivary glands?
90%
What is the primary function of saliva in digestion?
Moisten the food
What is the pH of saliva?
7
What is the pharynx part of?
Both the digestive and respiratory systems
What component of the digestive system processes ingested foods into molecular forms?
Gastrointestinal tract
What is the purpose of the digestive system?
To transfer small molecules, ions, and water to the body's internal environment
Learn about the three main sections of the small intestine, including the duodenum, jejunum, and ileum, and their roles in digestion and absorption of nutrients. Discover the importance of villi and microvilli in increasing the surface area of the small intestine.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
