Nokea
Amylase in saliva initiates digestion of:
- A. lipids
- B. proteins
- C. fats
- D. carbohydrates
Correct Answer: D
Rationale: Salivary amylase breaks down carbohydrates into simpler sugars.
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Sweating during exercise will cause loss of water to the body. It is important to replace the water or could set in:
- A. leukemia
- B. dehydration
- C. heart disease
- D. diabetes
Correct Answer: B
Rationale: Dehydration occurs when water loss exceeds intake, a common risk during exercise.
Enzyme pepsin acts upon food at a pH of about-
- A. 1.8 to split proteins
- B. 2 to split carbohydrate
- C. 7 to change protein into peptones
- D. 2 to change protein in amino acids
Correct Answer: A
Rationale: Pepsin works at a pH of about 1.8 to break down proteins into peptides.
Parotid gland, all true except:
- A. Secrete 25% of salivary secretion
- B. Formed mainly of mixed acini
- C. Has prominent striated ducts
- D. Its inflammation results in mumps
Correct Answer: B
Rationale: The parotid gland is purely serous, not mixed, secreting watery saliva rich in enzymes.
An older adult client asks the nurse why laxatives are frequently required to have a bowel movement. The nurse bases the response to this question on knowledge that:
- A. Older adults frequently abuse laxatives
- B. Laxatives are very often contraindicated in the older population
- C. Enemas are preferred over laxatives to evacuate the bowel
- D. Decreased bowel peristalsis is common in older adults
Correct Answer: D
Rationale: Aging often reduces peristalsis, slowing bowel movements and increasing the need for laxatives.
What happens during defecation?
- A. Food is chewed
- B. Nutrients are absorbed
- C. Chyme is formed
- D. Undigested waste is expelled
Correct Answer: D
Rationale: Defecation is the final stage where undigested waste (feces) is eliminated via the anus.