Nokea
Obstruction of the common bile duct by gallstones would most likely affect the digestion of:
- A. carbohydrates
- B. fats
- C. proteins
- D. nucleic acids
Correct Answer: B
Rationale: Bile is essential for the emulsification and digestion of fats. An obstruction in the common bile duct would impair fat digestion.
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In pancreas, pancreatic juice and hormone are secreted by-
- A. Islets of Langerhans
- B. Cells of Acini and Islets of Langerhans respectively
- C. Islets of Langerhans and cells of Acini respectively
- D. None of these.
Correct Answer: B
Rationale: Pancreatic juice is secreted by acinar cells, and hormones by Islets of Langerhans.
Largest gland of body -
- A. Pancreas
- B. Duodenum
- C. Liver
- D. Thyroid
Correct Answer: C
Rationale: The liver is the largest gland in the human body, performing numerous metabolic functions.
Starch is digested to maltose by the enzyme amylase. According to the 'lock and key' hypothesis, which is the 'key' and which is the 'lock'?
- A. key: amylase, lock: starch
- B. key: starch, lock: amylase
- C. key: maltose, lock: amylase
- D. key: amylase, lock: maltose
Correct Answer: A
Rationale: In the lock and key model, the enzyme (amylase) is the key that specifically binds to the substrate (starch), acting as the lock.
Hyperthermic means:
- A. Too cold
- B. Normal
- C. Too hot
- D. Stable
Correct Answer: C
Rationale: Hyperthermic refers to an abnormally high body temperature.
Which digestive processes take place in the mouth (buccal) cavity?
- A. chemical digestion
- B. mechanical digestion
- C. dissolving of nutrients
- D. all of the above
Correct Answer: D
Rationale: In the mouth, food undergoes mechanical digestion via chewing, chemical digestion through salivary amylase, and dissolving of nutrients.