Some Easy Questions
Q1. What is the role of saliva in digestion?
Q2. Why do we taste food sweeter after chewing it for a longer time?
Q3.What is the role of HCl in the stomach?
Q4.Your stomach contains hydrochloric acid, but you don’t experience any burning sensation. Why?
Q5. What is the role of villi in the intestine?
Answers
Answer:
1.The role of saliva in the digestion of food is It moistens the food for easy swallowing. It contains a digestive enzyme called salivary amylase, which breaks down starch into sugar. It generates around
2.The reason why the food tastes sweeter after chewing it for a longer time because the saliva contains “Amylase” which reacts with the starch present in the doo and converts it into glucose sugar particles which give a sweet taste to the food that we are chewing for a longer period of time.
3. Hydrochloric acid (also known as stomach acid) is the main component of gastric juices produced in the stomach. It is the only acid produced by our bodies; the other acids are the byproducts of metabolisms.
4.The reason behind you are not feeling the burning sensation in your stomach despite of HCL presence is just because of the Mucous secretion. Mucous is secreted at the gastric pits and enters the stomach to form a protective cover over the walls of the stomach.
5. The cells of the villi and another part of the small intestine, known as the crypts, transport food from the digestive tract into the bloodstream, where they can be used by the body. The villi aid in absorption by increasing the surface area of the intestine and contain specialized cells which transport different types of nutrients into the blood.
Answer:
1. Saliva is 98% water, so it moistens the mouth and helps compact food into softened particles for easier swallowing. ... It's important to chew your food as much as possible, as taking longer to chew gives the enzymes in saliva time to begin the process of breaking down carbohydrates, a very important part of digestion.
2. It breaks down starch in bread into simpler sugars (maltose) which give a sweet taste, since you are chewing for a longer while, more time and more mixing, for enzymatic action and hence you perceive it as sweet.
3. The hydrochloric acid in the gastric juice breaks down the food and the digestive enzymes split up the proteins. The acidic gastric juice also kills bacteria. ... Together with the bicarbonate, this ensures that the stomach wall itself is not damaged by the hydrochloric acids
4. HCl in the lumen doesnt digest the mucosa because goblet cells in the mucosa secrete large quantities of protective mucus that line the mucosal surface. Basic electrolytes, such as HCO3-, trapped inside the layer of mucus neutralize any HCl that penetrates the mucus.
5. The structure of the small intestine is designed for absorption of nutrients. The inside of the small intestine is lined with villi that absorb nutrients from the liquid mixture called chyme produced in the stomach from the food we eat.