NCERT Solutions for Class 11 Biology Chapter 19 - Excretory Products and their Elimination

 

NCERT Solutions for Class 11 Biology Chapter 19 - Excretory Products and their Elimination: In this chapter of Human Physiology unit, you will learn the mechanisms of elimination of these substances with special emphasis on common nitrogenous wastes. Ammonia, urea and uric acid are the major forms of nitrogenous wastes excreted by the animals. Ammonia is the most toxic form and requires a large amount of water for its elimination, whereas uric acid, being the least toxic, can be removed with a minimum loss of water. The process of excreting ammonia is Ammonotelism.

Many bony fishes, aquatic amphibians and aquatic insects are ammonotelic in nature. Ammonia, as it is readily soluble, is generally excreted by diffusion across body surfaces or through gill surfaces (in fish) as ammonium ions. Kidneys do not play any significant role in its removal. Chapter 19 - Excretory Products and their Elimination will let you know about the Excretory Products and their Elimination in different organisms (including humans).

Here are the important topics of NCERT Class 11 Biology Chapter 19 - Excretory Products and their Elimination mentioned below:

19.1 Human Excretory System

19.2 Urine Formation

19.3 Function of the Tubules

19.4 Mechanism of Concentration of the Filtrate

19.5 Regulation of Kidney Function

19.6 Micturition

19.7 Role of other Organs in Excretion

19.8 Disorders of the Excretory System

Urine formation involves three main processes, i.e., filtration, reabsorption, and secretion. Filtration is a non-selective process performed by the glomerulus using the glomerular capillary blood pressure. About 1200 ml of blood is filtered by the glomerulus per minute to form 125 ml of filtrate in the Bowman’s capsule per minute (GFR). JGA, a specialized portion of the nephrons, plays a significant role in the regulation of GFR. Nearly 99 percent reabsorption of the filtrate takes place through different parts of the nephrons.

After going through Class 11 Biology Chapter 19 - Excretory Products and their Elimination thoroughly, you must be able to answer the following questions:

  • Q1. Terrestrial animals are generally either ureotelic or uricotelic, not ammonotelic, why?
  • Q2. What is the significance of the juxtaglomerular apparatus (JGA) in kidney function?
  • Q3. Name the following:
    • (a) A chordate animal having flame cells as excretory structures
    • (b) Cortical portions projecting between the medullary pyramids in the human kidney
    • (c) A loop of capillary running parallel to the Henle’s loop.

If you have any query in solving these questions then, don't worry NCERT Solutions for Class 11 Biology Chapter 19 - Excretory Products and their Elimination will help you in answering these questions by understanding the concept behind it. Also, try to solve all the questions given in Chapter 19 - Excretory Products and their Elimination,

NCERT Solutions for Class 11 Biology Chapter 19 Excretory Products and their Elimination- Solved Exercise Questions

The NCERT solutions for Class 11 Biology, will help you to get the answers to all the questions which are mentioned in the NCERT book. It will also help you in the preparations of other competitive exams like NEET and JIPMER along with your school exam.

NCERT Solutions for class 11 Biology

Chapter-1

The Living World

Chapter-2

Biological Classification

Chapter-3

Plant Kingdom

Chapter-4

Animal Kingdom

Chapter-5

Morphology of Flowering Plants

Chapter-6

Anatomy of Flowering Plants

Chapter-7

Structural Organisation in Animals

Chapter-8

Cell: The Unit of Life

Chapter-9

Biomolecules

Chapter-10

Cell Cycle and Cell Division

Chapter-11

Transport in Plants

Chapter-12

Mineral Nutrition

Chapter-13

Photosynthesis in Higher Plants

Chapter-14

Respiration in Plants

Chapter-15

Plant Growth and Development

Chapter-16

Digestion and Absorption

Chapter-17

Breathing and Exchange of Gases

Chapter-18

Body Fluids and Circulation

Chapter-20

Locomotion and Movement

Chapter-21

Neural Control and Coordination

Chapter-22

Chemical Coordination and Integration

NCERT Solutions for Class 11- Subject wise

NCERT solutions for Class 11 Biology

NCERT solutions for Class 11 Maths

NCERT solutions for Class 11 Chemistry

NCERT solutions for Class 11 Physics

 

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