Enzymes in Salivary Digestion
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Questions and Answers

What is the primary function of the enzyme amylase in saliva?

  • To break down select starches into maltose and dextrin (correct)
  • To catalyze the transfer of one-carbon groups
  • To initiate the breakdown of proteins into peptides
  • To break down fats into glycerol and fatty acids

What is the classification of enzymes that catalyze the removal of groups from substrates by means other than hydrolysis?

  • Lyases (correct)
  • Transferases
  • Oxidoreductases
  • Hydrolases

What is the percentage of water in saliva?

  • 98%
  • 95%
  • 90%
  • 99% (correct)

What is the term for enzymes that catalyze the interconversion of optical and geometric isomers?

<p>Isomerases (A)</p> Signup and view all the answers

What is the name of the protein that is responsible for protecting the teeth from acid and bacteria?

<p>Statherins (C)</p> Signup and view all the answers

What is the primary location where most chemical digestion takes place?

<p>Small intestine (C)</p> Signup and view all the answers

What is the average daily production of saliva in a healthy person?

<p>Three pints (B)</p> Signup and view all the answers

What is the hormone responsible for stimulating the release of pancreatic enzymes into the small intestine?

<p>Cholecystokinin (D)</p> Signup and view all the answers

What is the primary function of pancreatic amylase?

<p>Breaking down carbohydrates (C)</p> Signup and view all the answers

What is the condition characterized by delayed gastric emptying, often found in patients with diabetes mellitus?

<p>Gastroparesis (A)</p> Signup and view all the answers

What is the purpose of secretin in the digestive process?

<p>Neutralizing stomach acid in the small intestine (C)</p> Signup and view all the answers

Which of the following is NOT a major class of nutrients that undergoes digestion in the small intestine?

<p>Nucleic acids (D)</p> Signup and view all the answers

What is the primary role of bile salts in lipid digestion?

<p>To emulsify triglycerides and aid access by pancreatic lipase (C)</p> Signup and view all the answers

Which enzyme is responsible for breaking down oligosaccharides into simple sugars?

<p>Dextrinase and glucoamylase (D)</p> Signup and view all the answers

What is the primary function of trypsin and chymotrypsin in protein digestion?

<p>To cleave proteins into smaller peptides (B)</p> Signup and view all the answers

What is the primary role of pancreatic lipase in lipid digestion?

<p>To break down triglycerides into fatty acids and monoglycerides (D)</p> Signup and view all the answers

Which enzyme is responsible for breaking down triglycerides into free fatty acids and monoglycerides?

<p>Pancreatic lipase (B)</p> Signup and view all the answers

What is the primary function of brush border enzymes in carbohydrate digestion?

<p>To cleave carbohydrates into simple sugars (B)</p> Signup and view all the answers

Which type of medication can cause or exacerbate xerostomia?

<p>Antihypertensives and antidepressants (A)</p> Signup and view all the answers

What is the primary consequence of chronic xerostomia on patients' lives?

<p>Drastic alteration of daily life (D)</p> Signup and view all the answers

What type of enzyme splits proteins into small peptides and amino acids?

<p>Proteases and peptidases (B)</p> Signup and view all the answers

Where does the majority of digestion occur in the human body?

<p>Stomach and small intestine (C)</p> Signup and view all the answers

What is the primary function of saliva in digestion?

<p>None of the above (D)</p> Signup and view all the answers

What symptom of xerostomia makes eating impossible?

<p>All of the above (D)</p> Signup and view all the answers

What is the primary function of pepsin in the digestive system?

<p>To break down proteins into smaller peptides (A)</p> Signup and view all the answers

Which of the following statements is true about the effects of alkali on pepsin and pepsinogen?

<p>Alkali destroys pepsin but protects pepsinogen (B)</p> Signup and view all the answers

Which exocrine gland is responsible for secreting digestive enzymes in the small intestine?

<p>Secretory glands (A)</p> Signup and view all the answers

What is the function of pepsinogen in the digestive system?

<p>To convert into pepsin in the presence of acid (A)</p> Signup and view all the answers

What is the primary aspect of gastric function studied in clinical practice?

<p>Acid secretion (B)</p> Signup and view all the answers

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