Podcast
Questions and Answers
What is the relationship between salivary bicarbonate concentration and plasma bicarbonate concentration at high flow rates?
What is the relationship between salivary bicarbonate concentration and plasma bicarbonate concentration at high flow rates?
- Salivary bicarbonate is independent of plasma bicarbonate.
- Salivary bicarbonate is equal to plasma bicarbonate.
- Salivary bicarbonate is higher than plasma bicarbonate. (correct)
- Salivary bicarbonate is lower than plasma bicarbonate.
Which enzyme in saliva can hydrolyze triglycerides without the help of bile salts?
Which enzyme in saliva can hydrolyze triglycerides without the help of bile salts?
- Gastric lipase
- Alpha-amylase
- Pancreatic lipase
- Lingual lipase (correct)
What is the primary regulation of salivary gland secretion?
What is the primary regulation of salivary gland secretion?
- Local paracrine factors
- Hormonal regulation
- Parasympathetic nervous system
- Sympathetic nervous system (correct)
What is the pH range in which salivary alpha-amylase is active?
What is the pH range in which salivary alpha-amylase is active?
How do the sodium and chloride concentrations in saliva compare to those in plasma?
How do the sodium and chloride concentrations in saliva compare to those in plasma?
What is the primary role of the sympathetic nervous system in the gastrointestinal tract?
What is the primary role of the sympathetic nervous system in the gastrointestinal tract?
What percentage of water is absorbed by the small intestine?
What percentage of water is absorbed by the small intestine?
What is the most important function of saliva in the oral cavity?
What is the most important function of saliva in the oral cavity?
How does the flow rate of saliva affect its pH?
How does the flow rate of saliva affect its pH?
Which ion in saliva is affected the most by changes in flow rate?
Which ion in saliva is affected the most by changes in flow rate?
Which hormone is responsible for stimulating the secretion of intrinsic factor in the stomach?
Which hormone is responsible for stimulating the secretion of intrinsic factor in the stomach?
What is the primary function of the superior cervical ganglion in the regulation of salivary secretion?
What is the primary function of the superior cervical ganglion in the regulation of salivary secretion?
In the stomach, what triggers the receptive relaxation that allows for food storage?
In the stomach, what triggers the receptive relaxation that allows for food storage?
Which of the following inhibits the pathway that leads to salivary gland secretion?
Which of the following inhibits the pathway that leads to salivary gland secretion?
What is the role of pancreatic bicarbonate production in the digestive process?
What is the role of pancreatic bicarbonate production in the digestive process?
During which phase of secretion does food enter the duodenum and activate chemo- and mechanoreceptors in the mucosa?
During which phase of secretion does food enter the duodenum and activate chemo- and mechanoreceptors in the mucosa?
What is the process called when bile acids are actively absorbed at the ileum and return to the liver via the portal circulation?
What is the process called when bile acids are actively absorbed at the ileum and return to the liver via the portal circulation?
Which nervous system pathway controls gastric secretion during the cephalic phase when there is no food in the stomach yet?
Which nervous system pathway controls gastric secretion during the cephalic phase when there is no food in the stomach yet?
Which phase occurs before food enters the stomach and involves thinking about food or smelling food?
Which phase occurs before food enters the stomach and involves thinking about food or smelling food?
Which portion of the small intestine acts as the site where bile acids are absorbed and returned to the liver?
Which portion of the small intestine acts as the site where bile acids are absorbed and returned to the liver?
What is the primary hormone responsible for activating the parietal cells in the stomach?
What is the primary hormone responsible for activating the parietal cells in the stomach?
Which of the following receptors in the stomach are activated by food distension and stimulate the release of acetylcholine?
Which of the following receptors in the stomach are activated by food distension and stimulate the release of acetylcholine?
In the gastric phase, what is released by G cells in response to distension of the stomach?
In the gastric phase, what is released by G cells in response to distension of the stomach?
What is the role of gastrin in the gastric phase of digestion?
What is the role of gastrin in the gastric phase of digestion?
Which of the following hormones is NOT involved in the regulation of salivary secretion?
Which of the following hormones is NOT involved in the regulation of salivary secretion?
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