Nokea
Match each term with the correct description: organs that filter blood to remove wastes collected from all cells
- A. urethra
- B. urinary system
- C. bladder
- D. kidneys
Correct Answer: D
Rationale: The kidneys filter blood to remove cellular wastes.
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Which organ in the list is the largest gland in the human body?
- A. parotid
- B. liver
- C. pancreas
- D. thyroid
Correct Answer: B
Rationale: The liver is the largest gland in the human body, weighing about 1.5 kg in adults, and performs numerous functions including bile production and detoxification.
Why is pepsin not secreted into the stomach?
- A. Because it would digest the stomach
- B. It is secreted into the stomach
- C. Because it would be inactivated by the acid in the stomach
- D. It is secreted into the intestine
Correct Answer: B
Rationale: Pepsin is secreted into the stomach as pepsinogen by chief cells and activated by stomach acid. It does not digest the stomach due to the protective mucus layer.
Which nerve is primarily responsible for the neural control of the gastric phase, including the stimulation of gastric secretions?
- A. Facial nerve
- B. Vagus nerve
- C. Glossopharyngeal nerve
- D. Spinal accessory nerve
Correct Answer: B
Rationale: The vagus nerve (cranial nerve X) is the primary nerve responsible for parasympathetic control of the stomach, stimulating gastric secretions and motility during the gastric phase.
Process of absorption of nutrients is carried out by
- A. Passive transport
- B. Facilitated transport
- C. Active transport
- D. All of the above
Correct Answer: D
Rationale: Nutrient absorption involves passive, facilitated, and active transport mechanisms.
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.