NCERT Solutions for class 11 Biology Chapter 16 : Digestion and Absorption

NCERT Solutions for Class 11 Biology Chapter 16 Digestion and Absorption are provided in the article below. This chapter 16 comes under Unit V- Human Physiology, which is omitted from CBSE Class 11 Exam 2022-23. It comprises all the important definitions, concepts, and methodologies that will be really beneficial for the students. The important topics that are included in this chapter are:

Alimentary canal and digestive glands, digestive enzymes, and gastrointestinal hormones
Peristalsis
Egestion
Nutritional, digestive disorders and the digestive system

Expected no. of Questions: 1-2 questions of around 2 marks.

Download PDF: NCERT Solutions for Class 11 Biology Chapter 16 Digestion and Absorption

NCERT Solutions for Class 11 Biology Chapter 16

Class 11 Biology Chapter 16 Digestion and Absorption: Important Topics

Digestion is the process of breaking down large insoluble food into soluble food through enzymes which can then be absorbed into the blood. Human Digestive System is the collection of organs that are responsible for digestion. It is a vital process that is driving the human race. The digestive system includes a digestive tract, which connects organs from the mouth to the large intestine.

Alimentary canal and digestive glands

The alimentary canal constitutes the entire passage wherein the ingested food is broken down into its constituents and is absorbed for use by the body. When all the components of the gastrointestinal tract are stretched out, end to end, it roughly measures 30 feet or about 9 meters.

The components of the alimentary canal are as follows:

Oral cavity (Also called the buccal cavity)
Pharynx (plural: pharynges)
Oesophagus
Stomach
Small intestine
Large intestine
Rectum
Anus

Accessory Organs of the Digestive System

There are additional organs and glands, apart from the organs in the gastrointestinal tract, that are not directly a part of the digestive system but they provide crucial functions that aid digestion absorption or break down of food. These are the accessory organs of the digestive system.

Chapter Related Links:

Digestion of food	Absorption of digested products	Disorders of the digestive system
Absorption	Egestion	Gastric
Vestigial Organs	Visceral Fat	Liver Diagram

CBSE Class 11 Biology Study Guides:

CBSE Class 11 Biology Syllabus	CBSE Class 11 Biology NCERT Textbook	CBSE Class 11 Biology Sample Paper
Biology Study Material	Biology MCQs	Difference between in Biology

CBSE CLASS XII Related Questions

1.
Flowering plants with hermaphrodite flowers have developed many reproductive strategies to ensure cross-pollination. Study the given outbreeding devices adopted by certain flowering plants and answer the questions that follow.

Note : All plants belong to the same species. No pollen tube growth/inhibition of pollen germination on stigma. Pollen germination on stigma.
- [(a)] Name and define the outbreeding device described in the above table.
- [(b)] Explain what would have been the disadvantage to the plant in the absence of the given strategy.
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2.
Write the composition of intine and exine layers of a pollen grain.
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3.
Student to attempt either option (A) or (B):
(A) (i) Explain why the milk produced by the mother during the initial days of lactation is considered to be very essential for the newborn infant.
(ii) What is the term used for the milk produced during the initial days of lactation?
OR
(B) Many children in the metro cities are suffering from a very common exaggerated response of the immune system to certain weak antigens in air.
(i) What is the term used for the above mentioned disease?
(ii) Name the main type of antibody produced by the immune system in response to this disease.
(iii) Which two main inflammation-causing chemicals are produced by the mast cells in such an immune response?
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4.
Study the given below single strand of deoxyribonucleic acid depicted in the form of a “stick” diagram with 5′ – 3′ end directionality, sugars as vertical lines and bases as single letter abbreviations and answer the questions that follow.

Name the covalent bonds depicted as (a) and (b) in the form of slanting lines in the diagram.
How many purines are present in the given “stick” diagram?
Draw the chemical structure of the given polynucleotide chain of DNA.
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5.
Name any two VDs which might occur in a human female. State any two complications in a female if it is left untreated.
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6.
Enlist three advantages of genetically modified plants.
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