Pdf Book Name: Biology Standard 10 X NEET NTSE KVPY Foundation Explorer Key Explanation Brain Mapping Academy Hyderabad Class 10
Author: Brain Mapping Academy Hyderabad SOF SFO
Publisher: Brain Mapping Academy SOF SFO
ISBN-10, 13: 9382058206,9789382058205
File size: 12 MB
File format: PDF,EPUB
Biology Standard 10 X NEET NTSE KVPY Foundation Explorer Key Explanation Brain Mapping Academy Hyderabad Class 10 Pdf Book Description:
Arteries carry deoxygenated blood from the heart to the lungs and oxygenated blood from the heart to the rest oft he body. 2. (A) Bananas are rich in carbohydrates (mainly sugars) and low in protein and fat. 3. (C) Most foods consist of molecules that are too large to diffuse through the wall of the small intestine into the bloodstream. 4. (8) The maximum activity occurs at a pH of 2-3, indicating acidity. The gastric juice in the stomach contains dilute hydrochloric acid along with enzymes. Other parts of the digestion system are alkaline. 5. (D) The human alimentary canal begins at the mouth and ends at the anus. 6. (C) A large surface area means that more of the food is in contact with the saliva, thus speeding up the digestion. Option (A) also happens but does not answer the ‘How’ in the question. Lipase help in the digestion of fats. Amylase is present in human saliva and begins the digestion of starch to sugars . Carbohydrase converts maltose to glucose. Proteases are a group of enzymes that convert simple proteins to amino acids. 8. (C) The digestion of carbohydrates, proteins and fats is completed in the small intestine. 9. (8) In the stomach, proteins are broken down into simpler proteins. No digestion of carbohydrates or fats occurs in the stomach. 10. (C) Fat molecules change into smaller glycerol and fatty acid molecules in the small intestine. 11. (8) The wall of the small intestine is partially permeable thus allowing the small digested food molecules through. 12. (D) Bile does not digest any foods. It just breaks fats into small droplets of fat, increasing their surface area and making the digestion of fats faster. 13. (A) Gastric juice is found in the stomach and contains enzymes for the digestion of proteins. 14. (D) Bile is made in the liver, stored in the gall bladder and released into the small intestine. 15. (A) Bile does not digest any foods. It just breaks fats into small droplets of fat, increasing their surface area and making the digestion of fats faster. 16. (C) Water is absorbed into the body from the large intestine. Solid material received from the small intestine passes through the large intestine and out of the body through the anus. 17.
(A) The small intestine is a long tube with many villi that provides a large surface area for the absorption of food molecules. The small intestine has a thin wall to allow for faster absorption. 18. (D) There are two tubes in our throat, the gullet and the windpipe. The gullet is the passage for food from the mouth to enter the stomach. The windpipe is the passage for air from the nose or mouth to enter the lungs. We choke when food enters the windpipe by accident. When we swallow food, a flap of tissue called the epiglottis covers the opening to the windpipe so that food particles cannot enter the windpipe. Occasionally the flap fails to function and food or water may get into the windpipe. When this happens, we will automatically cough in an attempt to force the food or water out.The digested food passes through the thin walls of the small intestine and enters the bloodstream. The blood carries the digested food to all parts of the body. In the cells, the energy stored in the digested food is released when respiration takes place. 20. (C) Partly digested food enters the small intestine. Digested food passes through the walls of the small intestine into the bloodstream. Undigested food enters another stretch of tube called the large intestine where water is absorbed. 21. (8) Honey drink contains sugars and water that are small enough to pass through the walls of the small intestine and enter the bloodstream.
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