a) In the stomach there is acidic medium due to presence of hydrochloric acid (HCl) and ptyalin only acts at slightly alkaline medium hence its denatured or destroyed by a low pH.
b) High temperature above 40o, altering pH medium
c) - Presence of Villi
- Increased length
johnmulu answered the question on May 1, 2017 at 13:13
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