McqMate
| Q. |
The acid which is secreted by the glands in the stomach wall is – |
| A. | sulphuric acid |
| B. | hydrochloric acid |
| C. | nitric acid |
| D. | phosphoric acid |
| Answer» B. hydrochloric acid | |
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Explanation: Gastric acid is a digestive fluid, formed in the stomach. It has a pH of 1.5 to 3.5 and is composed of hydrochloric acid (HCl) (around 0.5%, or 5000 parts per million), and large quantities of potassium chloride (KCl) and sodium chloride (NaCl). The acid plays a key role in digestion of proteins, by activating digestive enzymes, and making ingested proteins unravel so that digestive enzymes can break down the long chains of amino acids. |
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