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How does the pH change from the mouth to the anus in the digestive system?

How does the pH change from the mouth to the anus in the digestive system? Correct Answer Acidic - alkaline

The correct answer is Acidic - alkaline.

Key Points

  • The Ph of mouth is 6.2 to 7.6 with 6.7 pHs being the average.
  • In the oral activity, the Ph is maintained near neutrality by saliva. The saliva contributes to the maintenance of the Ph by two mechanisms.
  • The normal volume of the stomach fluid is 20 to 100 mL and the pH is acidic (1.5 to 3.5).
  • Gastric acid or Gastric juice is a digestive fluid formed within the stomach lining. 
  • A typical adult human stomach will secrete about 1.5 liters of gastric acid daily.

Additional Information

  • Different levels of Ph in different organs is as follows-
Organ pH 
Skin 4-6.5
Urine 4.6-8.0
Gastric 1.35-3.5
Cerebrospinal Fluid 7.3
Intracellular fluid 6-7.2

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