Nokea
A digestive enzyme, salivary amylase in the saliva begins digestion of-
- A. Starch
- B. Fiber
- C. Proteins
- D. Fats
Correct Answer: A
Rationale: Saliva contains the enzyme amylase that breaks some starches down into maltose and dextrin. Thus, digestion of food occurs within the mouth, even before the food reaches the stomach.
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Of the following, which organ does food NOT pass through?
- A. pancreas
- B. stomach
- C. mouth
- D. small intestine
Correct Answer: A
Rationale: Food does not pass through the pancreas; it produces digestive enzymes that aid digestion.
The liver facilitates the conjugation of bilirubin with glucuronic acid, resulting in the formation of bilirubin glucuronide. The primary objective of this process is to:
- A. Convert bilirubin into a form suitable for storage within the body
- B. Generate bile salts required for the absorption of lipids
- C. Enable the transportation of bilirubin in the blood to sites where it can be utilized
- D. Render bilirubin water-soluble, facilitating its excretion in the urine
Correct Answer: D
Rationale: Conjugation makes bilirubin water-soluble, allowing its excretion in bile and urine, preventing accumulation.
Match: Bile
- A. breaks fat into smaller droplets
- B. digests carbohydrates
- C. absorbs vitamins
- D. neutralizes stomach acid
Correct Answer: A
Rationale: Bile emulsifies fats, breaking them into smaller droplets to facilitate digestion by lipases.
Secretin is a hormone that:
- A. stimulates the release of pancreatic fluid
- B. converts trypsinogen into trypsin
- C. activates chymotrypsin
- D. inhibits the action of pancreatic lipase
Correct Answer: A
Rationale: Secretin stimulates the pancreas to release bicarbonate-rich fluids to neutralize stomach acid.
Crypts of Lieberkuhn are found in between the villi. They secrete :
- A. Glucagon
- B. Succus entericus
- C. Insulin
- D. Gastric juice
Correct Answer: B
Rationale: Crypts of Lieberkuhn secrete succus entericus for intestinal digestion.