29 Questions
What is the primary function of the stomach in the digestive process?
To mix food with gastric juices and form chyme
What is the main role of the pancreas in the digestive system?
To produce digestive enzymes and bicarbonate
Which of the following is a mechanical digestion process?
Mastication, churning, and segmentation
What is the main function of the large intestine in the digestive process?
All of the above
What is the role of bile salts produced by the liver?
To emulsify lipids for better digestion and absorption
Which of the following is a characteristic of peristalsis?
It propels food through the alimentary canal
What is the primary purpose of the mucosal barrier in the stomach?
To protect the stomach wall from the acidic environment
Which of the following is the most important function of hydrochloric acid in the stomach?
To break down proteins
What is the primary purpose of the gastric phase of digestion?
To prepare the food for further digestion in the intestines
What is the primary function of the intrinsic factor produced in the stomach?
To facilitate the absorption of vitamin B12
What is the main reason for the development of stomach ulcers?
Infection with the H. pylori bacteria
What is the order in which different types of food are emptied from the stomach into the duodenum?
Carbohydrates, proteins, fats
What is the function of the lingual frenulum?
Connects the tongue to the floor of the mouth
Which type of teeth are pointy to tear up food?
Cuspids (Canines)
What is the function of salivary amylase?
Initiates the breakdown of carbohydrates
In case of sympathetic stimulation, what happens to saliva production?
It decreases
Where is the Pulp cavity located within a tooth?
Contains nerves and blood vessels
Which part of the throat handles only air and not food?
Nasopharynx
Which of the following substances does pancreatic juice primarily digest?
Carbohydrates, proteins, and fats
What is the primary role of the gallbladder in the digestive system?
To store, concentrate, and propel bile into the duodenum
What is the primary mechanism by which the body absorbs carbohydrates?
Breaking down polysaccharides into monosaccharides
Where is most protein digestion and absorption believed to occur?
In the small intestine, especially the jejunum
What is the primary role of pancreatic lipase in the digestion of lipids?
To break down triglycerides into free fatty acids and monoglycerides
What is the main function of the sodium-potassium pump in the absorption of minerals?
To actively transport minerals across the intestinal epithelium
Where does most absorption take place in the digestive system?
Jejunum
Which hormone initiates peristalsis to move chyme through the intestine?
Motilin
What is the role of segmentation in digestion?
Mixing chyme with digestive juices
Which part of the small intestine contains circular folds, villi, and microvilli to enhance absorption?
Jejunum
How long does it take for all food to leave the small intestine?
3-5 hours
Test your knowledge about the functions of the digestive system, including the roles of the stomach and small intestine in digestion and nutrient absorption.
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