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Observe and analyse the graph and answer the following questions.1. Which region of the alimentary canal has maximum acidic pH? 2. Why different regions of alimentary canal has different pH How this is maintained? |
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Answer» 1. Stomach 2. pH is the buccal cavity – in between 6.5 and 7, which is maintained by HCO3 – in the saliva. pH in the stomach is in between 1.8 and 2, which is maintained by HCL, secreted from gastric gland. The pH in the intestine is in between 8 and 9, which is maintained by HCO3 – present in the bile and pancreatic juice. |
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