Important Questions for Class 11 Biology 16th Chapter Digestion and Absorption MCQ, Very Short, Short Type, Long Type
CBSE Class 11 Important Questions for Class 11 Biology Chapter 16 Digestion and Absorption all MCQ Type, Very Short Type, Assertion Reason Type, Case Study, Short Type and Long Type Questions with Answers by Expert. Important Questions for Section A, B, C, D Class 11 Biology Chapter 16.
- MCQs
1) The outer most layer making the wall of alimentary cannel is
a) Serosa
b) Muscularis
c) Sub-mucosa
d) Mucosa
2) Assertion: In the mucosa, there are irregular folds (rugae) in the stomach andsmall finger-like folding called villi in thesmall intestine
Reason: These modifications increase thesurface area enormously
a.) Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
b.) Both Assertion and Reason are correct and Reason is not the correct explanation for Assertion.
c.) If assertion is true but the reason is false.
d.) If both assertion and reason are false.
3) The largest gland in the body is
(a) Pancreas
(b) Liver
(c) Parotid gland
(d) Sub-mandibular gland
4) Assertion: Pancreas is a compound gland.
Reason: The exocrine portion secretes hormones, insulin and glucagon whereas the endocrine part secretes an alkaline pancreatic juice containing enzymes.
a.) Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
b.) Both Assertion and Reason are correct and Reason is not the correct explanation for Assertion.
c.) If assertion is true but the reason is false.
d.) If both assertion and reason are false.
5.)The saliva secreted into the oral cavity contains all except
A.) electrolytes and enzymes,
B.) salivary amylase
C.) lysozyme
D.) rennin
6.) Intrinsic factor secreted by parietal or oxyntic cells helps in the secretion of
a.) Vitamin B 12
b.) HCl
c.) Maltose
d.) Pepsinogen
7.) Usually, drugs are absorbed from the
a.)Mouth
b.) Stomach
c.) Small intestine
d.) Large intestine
8.) Assertion: Usually mammals possess two sets of teeth during their life.
Reason: This type of dentition is called diphyodont.
a.) Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
b.) Both Assertion and Reason are correct and Reason is not the correct explanation for Assertion.
c.) If assertion is true but the reason is false.
d.) If both assertion and reason are false.
9.) Assertion: Amylase is a splitting enzyme
Reason: It is a protein digesting enzyme present in animals.
a.) Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
b.) Both Assertion and Reason are correct and Reason is not the correct explanation for Assertion.
c.) If assertion is true but the reason is false.
d.) If both assertion and reason are false.
10.) Sucrose on action of sucrase breaks down into
a.) Glucose + Glucose
b.) Glucose + Galactose
c.) Glucose+ Fructose
d.) Fructose + Galactose
- Answer in one sentence
Q.1) Define: Digestion
Ans. Digestion is the mechanical and biochemical conversion of complex food substances into simple absorbable forms, which is carried out by our digestive system.
Q.2) What are the types of permanent teeth making up an adult human’s heterodont dentition?
Ans. The incisors (I), canines (C), premolars (PM), and molars (M) are the four types of permanent teeth that make up an adult human’s heterodont dentition (M).
Q.3) What are the parts of stomach?
Ans. The stomach is divided into four sections: a cardiac area into which the oesophagus opens, a fundic region, body (primary core region), and a pyloric portion that opens into the first part of the small intestine.
Q.4) How is chyme produced?
Ans. The chyme is made up of food that has been fully mixed with the stomach’s acidic gastric liquid by the churning movements of its muscular wall.
Q.5) How is the tounge attached to the oral cavity?
Ans. The tongue is a free-moving muscular organ connected to the oral cavity’s floor by the frenulum.
Q.6) What is papillae?
Ans. Small projections called papillae are found on the tongue’s upper surface, some of which contain taste buds.
Q.7) Name the digestive glands present in the alimentary canal.
Ans. The salivary glands, liver, and pancreas are digestive glands connected with the alimentary canal.
Q.8) Define: Assimilation
Ans. The absorbed compounds eventually make their way to the tissues, which use them for their functions. Assimilation is the term for this process.
- Answer in short
Q.1) State the functions of the large intestine
Ans. The large intestine has two functions:
i) Absorption of certain water, minerals, and medications; and
ii) Mucus secretion, which aids in sticking waste (undigested) particles together and lubricating them for easy passage.
Q.2) What is the composition of bile? State its function
Ans. 1.) The bile released into the duodenum contains bile pigments (bilirubin and bili-verdin), bile salts, cholesterol and phospholipids but no enzymes.
2.) Bile helps in emulsification of fats, i.e., breaking down of the fats into very small micelles. 3.) Bile also activates lipases.
Q.3) Describe the structure and function of pancreas.
Ans. 1.) The pancreas is an extended compound organ located between the arms of the duodenum’s ‘C’ shape.
2.) It has both endo and exocrine parts.
3.) The exocrine portion secretes enzyme-rich alkaline pancreatic juice, while the endocrine portion secretes hormones, insulin, and glucagon.
Q.4) Describe the process of absorption in stomach and small intestine?
Ans. 1.) Water, simple carbohydrates, alcohol, and other substances are absorbed in the stomach.
2.) The primary organ for nutrition absorption is the small intestine.
3.) The last products of digestion, such as glucose, fructose, fatty acids, glycerol, and amino acids, are absorbed into the bloodstream and lymphatic system through the mucosa of small intestine.
- Answer in brief
Q.1) How is heat measured?
Ans. 1.) The energy requirements of animals and the energy content of food are described in terms of heat energy.
2.) The amount of heat energy required to raise the temperature of 1 g of water by 1°C is measured in calorie (Cal) or joule (J).
3.) As this is such a little amount of energy, physiologists often use the terms kilocalorie (kcal) or kilojoule (kJ).
4.) The amount of energy necessary to raise the temperature of 1 kilogram of water by 1°C is one kilocalorie.
5.) The gross calorific or gross energy value of 1 g of food is the amount of heat liberated from complete combustion in a bomb calorimeter (a closed metal chamber filled with O2).
6.) The physiologic value of food is the amount of energy burned by 1 g of food.
Q.2) What are the causes of marasmus?
Ans. 1.) Marasmus is caused by a protein and calorie shortage at the same time.
2.) If mother’s milk is replaced too early by other foods that are low in both proteins and calories, it is found in newborns under the age of a year.
3.) Marasmus frequently occurs when a mother has a second pregnancy or gives birth to a child while the older child is still too young.
4.) Protein deprivation hampers growth and tissue protein replenishment in Marasmus, resulting in significant emaciation of the body and limb weakening, as well as dry, thin, wrinkled skin.
5.) The rate of growth and body weight decrease dramatically.
6.) The brain’s and mental abilities’ growth and development are also hampered.