In Class 11 Final Exams there will be Case studies and Passage Based Questions will be asked, So practice these types of questions. Study Rate is always there to help you. Free PDF Download of CBSE Class 11 Biology Chapter 16 Case Study and Passage Based Questions with Answers were Prepared Based on Latest Exam Pattern. Students can solve NCERT Class 11 Biology Digestion and Absorption to know their preparation level.

In CBSE Class 11 Biology Paper, There will be a few questions based on case studies and passage-based as well. In that, a paragraph will be given, and then the MCQ questions based on it will be asked.

Digestion and Absorption Case Study Questions With Answers

Here, we have provided case-based/passage-based questions for Class 11 Biology Chapter 16 Digestion and Absorption

Case Study/Passage-Based Questions

Case Study 1:

Absorption is the process by which the end products of digestion pass through the intestinal mucosa into the blood or lymph. It is carried out by passive, active or facilitated transport mechanisms. Small amounts of monosaccharaides like glucose, amino acids and some electrolytes like chloride ions are generally absorbed by simple diffusion. The passage of these substances into the blood depends upon the concentration gradients. However, some substances like glucose and amino acids are absorbed with the help of carrier proteins. This mechanism is called the facilitated transport. Transport of water depends upon the osmotic gradient. Active transport occurs against the concentration gradient and hence requires energy. Various nutrients like amino acids, monosaccharides like glucose and electrolytes like Na+ are absorbed into the blood by this mechanism. Fatty acids and glycerol being insoluble, cannot be absorbed into the blood. They are first incorporated into small droplets called micelles which move into the intestinal mucosa. They are re-formed into very small protein coated fat globules called the chylomicrons which are transported into the lymph vessels (lacteals) in the villi. These lymph vessels ultimately release the absorbed substances into the blood stream. Absorption of substances takes place in different parts of the alimentary canal, like mouth, stomach, small intestine and large intestine. However, maximum absorption occurs in the small intestine. The absorbed substances finally reach the tissues which utilise them for their activities. This process is called assimilation. The digestive wastes, solidified into coherent faeces in the rectum initiate a neural reflex causing an urge or desire for its removal. The egestion of faeces to the outside through the anal opening (defaecation) is a voluntary process and is carried out by a mass peristaltic movement.

1.) The end products of digestion pass through ____________ and then into blood.

• oesophagus
• intestinal mucus
• intestinal mucosa
• none of the above

Ans: intestinal mucosa

2.) Identify the incorrect statement

Statement 1 – The end products of digestion pass through the intestinal mucosa into the blood.

Statement 2 – Absorption is carried out by passive, active or facilitated transport mechanisms.

Statement 3 –Active transport occurs against the concentration gradient.

Statement 4 – Active transport doesn’trequires energy.

• a) Statement 1 is incorrect
• b) Statement 2 is incorrect
• c) Statement 3 is incorrect
• d) Statement 4 is incorrect

Ans:d) Statement 4 is incorrect

3.) Explain what is assimilation in case of reabsorption?

Ans: Assimilation – When the end product of digestion pass through the intestinal mucosa and absorbed into blood and these substances finally reach the tissues which utilise them for their activities. This process is called assimilation.

4.) Define Micelles and Chylomicrons?

Ans: Fatty acids and glycerol being insoluble, cannot be absorbed directly into the blood. They are first incorporated into small droplets called micelles which move into the intestinal mucosa. They are re-formed into very small protein coated fat globules called the chylomicrons which are transported into the lymph vessels (lacteals) in the villi.

5) Name the organ at which digestive wastes solidifies?

Ans: The digestive wastes solidified into coherent faeces in the rectum.

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