Nokea
The products of digested food are present in the ileum. Which substances enter a blood capillary and a lacteal in a villus?
- A. blood capillary: amino acids and glucose, lacteal: fatty acids and glycerol
- B. blood capillary: amino acids and glycerol, lacteal: fatty acids and glucose
- C. blood capillary: fatty acids and glucose, lacteal: amino acids and glycerol
- D. blood capillary: fatty acids and glycerol, lacteal: amino acids and glucose
Correct Answer: A
Rationale: Amino acids and glucose enter the blood capillaries, while fatty acids and glycerol are absorbed into the lacteals.
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Stomach is the main site for the digestion of -
- A. Fats
- B. Carbohydrate
- C. Protein
- D. All of these
Correct Answer: C
Rationale: The stomach primarily digests proteins via pepsin.
Which of the following parts of the digestive system has the most important role in nutrient absorption?
- A. stomach
- B. esophagus
- C. large intestines
- D. small intestines
Correct Answer: D
Rationale: The small intestine is the primary site for nutrient absorption due to its large surface area and specialized structures like villi and microvilli.
Which body system is NOT a part of the excretory system?
- A. respiratory system
- B. digestive system
- C. circulatory system
- D. urinary system
Correct Answer: C
Rationale: The circulatory system transports substances but is not directly part of excretion.
A dysfunction of the parietal cells of gastric glands would result in a decreased production of which two of the following?
- A. mucus
- B. pepsinogen
- C. hydrochloric acid
- D. pepsin
Correct Answer: C
Rationale: Parietal cells secrete hydrochloric acid and intrinsic factor.
Striated ducts, the following is true except:
- A. Lined by ion transporting cells
- B. Contain basal basophilic granules
- C. Contain basal acidophilic granules
- D. Present in salivary gland duct system.
Correct Answer: B
Rationale: Striated ducts have basal acidophilic striations due to mitochondria, not basophilic granules.