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The acid present in the human stomach that helps in digestion is?
A. Sulphuric acid
B. Hydrochloric acid
C. Nitric acid
D. Citric acid
Correct Answer Is Option = Hydrochloric acid
Notes / Explanation
The acid present in the human stomach that helps in digestion is hydrochloric acid, which is produced by the stomach and which plays an important role in the digestion of food. The stomach is a part of the digestive system, where food is received after it is swallowed and where an important part of the process of digestion takes place. The stomach produces a digestive juice that contains hydrochloric acid, along with other substances, and this acidic juice acts on the food in the stomach. The hydrochloric acid in the stomach serves several important purposes. It helps to break down the food and to create the acidic conditions needed for the action of certain substances in the stomach that digest the food, particularly the digestion of proteins, for which an acidic environment is required. The acid also helps to kill many of the harmful germs that may be present in the food, thereby protecting the body from infection, so that the acid of the stomach acts as a kind of defence against germs taken in with the food. The stomach is protected from being harmed by its own acid by a layer of mucus that lines and protects its walls. After the food has been acted upon in the stomach, it passes on to the next part of the digestive system, where the digestion is continued and the nutrients are absorbed. The production of too much or too little stomach acid, or problems with the protective lining of the stomach, can lead to discomfort and to certain conditions affecting the stomach. The acid of the stomach is a natural and essential part of the process of digestion. The study of the digestive system and the processes of digestion, including the role of the acid of the stomach, is a part of the study of the human body. For PPSC and other competitive examinations, the key points to remember are that the acid present in the human stomach is hydrochloric acid, that it is produced by the stomach as part of a digestive juice, that it helps in the digestion of food, particularly the digestion of proteins, and creates the acidic conditions needed for this, and that it also helps to kill harmful germs in the food, while the stomach is protected from its own acid by a lining of mucus.
