Nokea
All of the following are true of the stomach EXCEPT?
- A. Pepsinogen is activated to pepsin by HCl
- B. Parietal cells secrete intrinsic factor
- C. Chief cells secrete pepsinogen
- D. The pyloric region is a major site for nutrient absorption
Correct Answer: D
Rationale: The pyloric region primarily functions as a regulator of food movement into the small intestine, not as a major site for nutrient absorption.
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Cheek teeth are-
- A. Incisors and Canines
- B. Canines and Premolars
- C. Premolars and Molar
- D. Canines and Molars
Correct Answer: C
Rationale: Cheek teeth refer to premolars and molars, located in the back of the mouth for grinding food.
What are the advantages of chewing food at the start of digestion?
- A. increasing surface area
- B. lubricating food
- C. making food soluble
- D. all of the above
Correct Answer: D
Rationale: Chewing increases the surface area for enzyme action, lubricates food with saliva, and helps dissolve food particles.
Match each term with the correct description: made up of organs that rid your body of wastes and control blood volume
- A. urethra
- B. urinary system
- C. bladder
- D. kidneys
Correct Answer: B
Rationale: The urinary system includes organs that remove wastes and regulate blood volume.
Which organ in the digestive system absorbs the most water from food?
- A. esophagus
- B. large intestine
- C. small intestine
- D. stomach
Correct Answer: B
Rationale: The large intestine absorbs the most water from food, turning chyme into solid waste.
A gastrointestinal tumor involving villi and plicae circulares might interfere with:
- A. deglutition
- B. absorption
- C. peristalsis
- D. defecation
Correct Answer: B
Rationale: Villi and plicae circulares increase the surface area for absorption in the small intestine. A tumor affecting these structures would impair absorption.