 鲜花( 21)  鸡蛋( 0)
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I guess the following reference may have explaination about the pH.% |/ F, N5 E6 S, s% a, N3 Q$ D
( t% n9 ~! i( Z. {1 H0 _" _8 |Your stomach secretes hydrochloric acid, but the pH of your stomach isn't necessarily the same as the pH of the acid! The pH of your stomach varies, from 1-2 up to 4-5. When you eat, the stomach releases proteases and hydrochloric acid to aid in digestion. By itself, the acid doesn't really do much for digestion, but the proteases that cleave proteins work best in an acidic environment or low pH, so after a high-protein meal, your stomach pH may drop to as low as 1 or 2. However, buffers quickly raise the pH back to 3 or 4. After the meal has been digested, your stomach pH returns to a resting level of about 4 or 5. Your stomach secretes acid in response to food, so first thing in the morning you can expect a slightly acidic stomach pH, but not an acidic level representative of pure hydrochloric acid.
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鲜花鸡蛋JoyceAccSG 在2013-8-22 09:02 送朵鲜花 并说:我非常同意你的观点,送朵鲜花鼓励一下
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