The absorption of fructose by intestinal mucosa is
- A. Co-transport mechanism
- B. Simple diffusion
- C. Facilitated transport
- D. Active transport
Correct Answer: C
Rationale: Fructose is absorbed via facilitated transport through GLUT5 transporters in the intestinal mucosa.
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If an incision had to be made in the small intestine to remove an obstruction, which tunica would be cut first?
- A. muscularis
- B. mucosa
- C. submucosa
- D. serosa
Correct Answer: D
Rationale: The serosa is the outermost layer of the small intestine and would be the first layer cut during surgery.
Ventral [lower] surface of hard palate is covered by:
- A. Pseudo stratifies columnar epith.
- B. Stratified squamous keratinized (parakeratinized).
- C. Stratified squamous non keratinized.
- D. Transitional epith.
Correct Answer: B
Rationale: The ventral surface of the hard palate is covered by stratified squamous epithelium that is keratinized (often parakeratinized) to withstand mechanical stress from food. Pseudostratified columnar epithelium is found in respiratory regions, not here.
A client with an elevated amylase level asks the nurse about the altered value. The nurse bases a response on knowledge that amylase:
- A. Is an enzyme from the pancreas needed for carbohydrate digestion
- B. Plays no significant role in physiological processes
- C. Is an enzyme from the pancreas needed for fat digestion
- D. Is an enzyme from the pancreas that is the major component of bile
Correct Answer: A
Rationale: Amylase, produced by the pancreas, digests carbohydrates into sugars.
The primary site for absorption of water by the digestive system is the:
- A. oesophagus
- B. colon (large intestine)
- C. small intestine
- D. liver
Correct Answer: B
Rationale: The colon (large intestine) is the primary site for water absorption, consolidating waste into feces.
Match: Polysaccharide
- A. starch or cellulose
- B. composed of amino acids
- C. used for insulation
- D. makes up cell membranes
Correct Answer: A
Rationale: Polysaccharides, such as starch and cellulose, are complex carbohydrates that store energy or provide structural support.