CBSE 11th Standard Biology Subject Digestion and Absorption HOT Questions 3 Marks Questions With Solution 2021
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CBSE 11th Standard Biology Subject Digestion and Absorption HOT Questions 3 Marks Questions With Solution 2021
11th Standard CBSE
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Reg.No. :
Biology
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What would happen if the liver does not secrete bile?
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Stomach is the right place where hydrochlotic acid is required to be secreted in the gastric juice. Describe any three points to justify this statement.
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What would happen if for some reason goblet cells become non-functional. Why are these important for digestive system?
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Which part of the alimentary canal produce local digestive hormones? What would happen if these hormones are not produced?
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Out of the parts labelled as A, B, C and D of alimentary canal in the diagram below.Where is the enzyme responsible for the first stage of protein digestion produced?Label all parts, i.e., A-D.
3 Marks
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CBSE 11th Standard Biology Subject Digestion and Absorption HOT Questions 3 Marks Questions With Solution 2021 Answer Keys
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If the liver would stop secreting the bile,following may happen
(i) The fats in our diet would not digested, it is because bile helps in emulsiying fats and breaks it down for the body to absorb
(ii) The liver makes bile from chlesterol.Thus,higher levels of cholesterol in the body may occur.
(iii) Bilirubin is made from our dead red blood cells and is a type of a pigment , that also acts as a part of the bile.Hence, if the liver does not secrete bile, the bilirubin would stay in blood instead of being converted by the liver into soluble form and flows with the bile.
(iv) This may our skin,white of the wyes more yellow in color(jaundice),darken our urine and the stools would be whiter in color. -
Stomach, serves as a right place due to the following reasons
(i) HCl inactivates the salivary amylase and prevents further breakdown of disaccharide carbohydrate.
(ii) It kills microorganisms and lower the pH of stomach between 1.2.5 (very acidic).
(iii) Pepsinogen (inactive precursor of pepsin) in the presence of HCl is converted into pepsin (principal protease of stomach). -
If goblet cells are non-functional for some reason, this will adversely affect smooth movement of food down the intestine due to the absence of much.
These glands secrete mucus which along with succus entericus which helps in digestion and movement of food material in the alimentary canal. -
The local digestive hormones are produced by gastric and intestinal mucosa e.g., secretin, cholesyctokinine, etc. The hormones stimulate the activity of enzymes. If these are not produced, the process of digestion will be hindered and digestive system will not work properly.
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In the labelled part A(i.e., the stomach,) the enzyme responsible for first stage of protein digestion is produced.A-stomac, B-pancrease,C-small intestine,D-gall bladder.
3 Marks
