Introduction:
Lipids are hydrophobic in nature, so digestion and absorption of lipid is a more complicated process when compared to protein and carbohydrate digestion. Lingual lipase in the mouth secreted by intrinsic salivary glands digests small quantity of fat. This enzyme moistens the mouth even if we do not eat anything. Emulsification droplets, micelles, and chylomicrons are involved in lipid digestion.
Answer to Problem 1TYR
Correct answer:
Lingual lipase is an enzyme that begins the digestion of fat in the mouth; this is more active in the stomach because of the acidic pH. Therefore, option b is correct.
Explanation of Solution
Justify the reasons for the correct statement:
Lingual lipase is secreted by lingual serous glands that is collected in the stomach between and after every meal.
Option (b) is given as, “lingual lipase”.
Lingual lipase is one of the acidic enzymes involved in the digestion of fat.
Hence, option (b) is correct.
Justify reasons for the incorrect statements:
Option (a) is given as, “chymotrypsin”.
Chymotrypsin is secreted by the pancreas that digest proteins. Hence, it is a wrong answer.
Option (c) is given as, “carboxypeptidase”.
Carboxypeptidases are pancreatic secretions that are involved in protein digestion; it removes amino acid from the –COOH end. Hence, it is a wrong answer.
Option (d) is given as, “enteropeptidase”.
The trypsinogen (pancreatic zymogen) is converted to trypsin by enteropeptidase. Hence, it is a wrong answer.
Option (e) is given as, “dextrinase”.
Dextrinase enzyme in the small intestine is involved in digestion of starch, converting it into glucose. Hence, it is a wrong answer.
Hence, options (a), (c), (d), and (e) are incorrect.
Lingual lipase secreted by lingual serous glands is more active in the stomach.
Want to see more full solutions like this?
Chapter 25 Solutions
CONNECT ACCESS CARD FOR ANATOMY AND PHYSIOLOGY
- The bile from the liver is delivered to the _______. a. stomach b. liver c. small intestine d. colonarrow_forwardWhich of the following is/are (a) product(s) of the digestion of starch after the release of the pancreatic enzymes into the small intestine? A. lactose B. maltotriose C. α-dextrin D. limit dextrinarrow_forwardWhich of the following nutrients are digested within the small intestine? a. proteins b. lipids c. carbohydrates d. all of these choicesarrow_forward
- Which of the following is poorly absorbed by the enterocytes? a. Micelles b. Short- and medium-chain Fatty Acid c. Cholesterol d. 2-monoacylglycerolarrow_forwardOne of the following hormones decreases the translocation of the H+/K+ channels on the apical membrane of parietal cells and therefore decreases HCI production by the stomach: a. Gastrin b. Acetyl choline c. Histamine d. Somatostatinarrow_forwardWhich of the following enzymes that helps to break proteins is more likely active in the small intestine a. pepsin chemotrypsin b OC d b. trypsin d. carboxypeptidase C. e. (b, c, d)arrow_forward
- Before the hydrolysis of triglycerides can occur in digestion, they must first be emulsified by A. Bile salts B. Lipase C. Lipid hydrolase D. Gastric lipasearrow_forwardwhich of the following actions during the process of swallowing is a voluntary muscular action a.epiglottis closure b.buccal phase c.peristaltic contractions d.pharyngoesophageal phasearrow_forwardChemical digestion does not involve… A. stomach acid B. peristalsis C. enzymes D. the salivary glands secreting salivaarrow_forward
- What are lacteals? Which digested materials do they absorb? The small intestine produced many important enzymes.what does each do? a. Peptidases b. Maltase c. Sucrase d. Lactasearrow_forwardThere are two different kinds of secretions associated with the digestive system that needs to be understood to avoid confusion when describing how the digestive system functions. Which one of these secretions will be involved in the control of digestion through the blood? A.Endocrine B.Exocrinearrow_forwardWhich of the following statements about starch digestion is FALSE? a. It begins in the mouth. b. It occurs in the stomach. c. It requires the action of pancreatic amylase d. It requires brush border enzymes for completionarrow_forward
- Concepts of BiologyBiologyISBN:9781938168116Author:Samantha Fowler, Rebecca Roush, James WisePublisher:OpenStax College