16 Questions
What is the main function of saliva in the digestive process?
Facilitation of taste
Which of the following is a paracrine regulator of acid secretion in the stomach?
Histamine
What are the effects of acid, fat, and solutions of high osmolarity in the duodenum on gastric secretion?
Inhibition of gastric secretion
What is the function of somatostatin as a paracrine regulator of acid secretion in the stomach?
Inhibition of acid secretion
What is the main function of bile salts in the small intestine?
To emulsify dietary lipids
Which of the following is NOT a function of saliva?
Absorption of vitamins
What is the effect of vagal activation on parietal cells in the stomach?
Stimulation of HCl secretion
Which cell type releases histamine to induce HCl secretion in the stomach?
Enterochromaffin-like (ECL) cells
What is the main function of intrinsic factor in the stomach?
Absorption of vitamin B12
What is the primary role of myoepithelial cells in salivary glands?
Contract and eject saliva
What is the function of lysozyme found in saliva?
Protection against bacteria
During which phase is HCl secretion in the stomach primarily stimulated by distention and the presence of protein and amino acids?
Gastric phase
Which structure stores bile during interdigestive periods and aids in its concentration?
Gallbladder
What is the primary role of bile salts in the small intestine?
To emulsify dietary lipids
Which component is NOT part of the organic constituents of bile?
Hydrochloric acid
What is the main function of mucus in the stomach?
Lubricates and protects mucosa
Test your knowledge about the components of saliva, substrates, and digestion products of salivary amylase. Learn about the contrast in plasma and saliva concentrations at low and high secretion rates, stimuli and cell types involved in GI secretion, and the function of somatostatin and histamine as paracrine regulators of acid.
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