Multiple choice

Which of the following statements regarding the human digestion process is INCORRECT?

  1. The human gastrointestinal tract is around 9 meters long.

  2. The gastric phase occurs at the sight, thought and smell of food.

  3. The gastric phase is stimulated by distension of the stomach.

  4. Gastric acid is about 0.5% hydrochloric acid.

  5. Digestion begins in the mouth of an organism.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Different phases of digestion take place including the cephalic phase, gastric phase and intestinal phase. The cephalic phase occurs at the sight, thought and smell of food, which stimulate the cerebral cortex. Taste and smell stimuli are sent to the hypothalamus and medulla oblongata.

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