Nokea
Besides your urinary system, what other organs in your body help in excretion?
- A. lungs
- B. skin
- C. skin and lungs
- D. none of the above
Correct Answer: C
Rationale: Both the lungs (excreting carbon dioxide) and skin (excreting sweat) aid in excretion.
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One of the following is not true about the enteroendocrine cells:
- A. They are present in the stomach, small intestine and large intestine.
- B. They are of two types open and closed.
- C. They deliver their secretions only in the git lumen.
- D. They are also called argentaffine cells
Correct Answer: C
Rationale: Enteroendocrine cells release hormones into the bloodstream (endocrine function), not just the GIT lumen.
Match: Villi
- A. projections in the small intestine that absorb nutrients
- B. storage structures
- C. enzyme producers
- D. muscular layers
Correct Answer: A
Rationale: Villi are finger-like projections in the small intestine that increase surface area for efficient nutrient absorption.
Small finger-like projection, which produce numerous microscopic projections are supplied with a network of
- A. Blood capillaries and lacteal
- B. Blood capillaries only
- C. Lacteal only
- D. A large lymphoid vessel and valves
Correct Answer: A
Rationale: Villi contain blood capillaries and lacteals for absorbing nutrients like glucose and fats.
The nutrient that supplies bulk to help the movement of waste through the digestive system is
- A. protein
- B. vitamins
- C. minerals
- D. fibre
Correct Answer: D
Rationale: Fibre provides bulk and aids in the movement of waste through the digestive tract by promoting peristalsis.
Which of the following cells secrete pepsinogen?
- A. Parietal cells
- B. Alpha cells
- C. Chief cells
- D. Stem cells
Correct Answer: C
Rationale: Chief cells in the stomach are responsible for secreting pepsinogen, which is then activated to pepsin by the acidic environment created by HCl.