NCERT Solutions for Class 11 Biology Chapter 22 Chemical Coordination and integration


NCERT Solutions for Class 11 Biology Chapter 22 - Chemical Coordination and integration: You have already learned that the neural system provides point-to-point rapid coordination among organs. Neural coordination is fast but short-lived. As the nerve fibers do not innervate all cells of the body and the cellular functions need to be continuously regulated; a special kind of coordination and integration has to be provided. This function is carried out by hormones. The neural system and the endocrine system jointly coordinate and regulate the physiological functions in the body. There are special chemicals which act as hormones and provide chemical coordination, integration, and regulation in the human body.

These hormones regulate metabolism, growth, and development of our organs, the endocrine glands or certain cells. The endocrine system is composed of hypothalamus, pituitary and pineal, thyroid, adrenal, pancreas, parathyroid, thymus and gonads (testis and ovary). In addition to these, some other organs, e.g., gastrointestinal tract, kidney, heart, etc., also produce hormones. The pituitary gland is divided into three major parts, which are called as pars distalis, pars intermedia and pars nervosa.

Here are the important topics of NCERT Class 11 Biology Chapter 22 - Chemical Coordination and integration mentioned below:

22.1 Endocrine Glands and Hormones

22.2 Human Endocrine System

    22.2.1 The Hypothalamus

    22.2.2 The Pituitary Gland

    22.2.3 The Pineal Gland

    22.2.4 Thyroid Gland

    22.2.5 Parathyroid Gland

    22.2.6 Thymus

    22.2.7 Adrenal Gland

    22.2.8 Pancreas

    22.2.9 Testis

    22.2.10 Ovary

22.3 Hormones of Heart, Kidney and Gastrointestinal Tract

22.4 Mechanism of Hormone Action

NCERT Solution will tell you that the testis secretes androgens, which stimulate the development, maturation, and functions of the male accessory sex organs, appearance of the male secondary sex characters, spermatogenesis, male sexual behavior, anabolic pathways, and erythropoiesis. The ovary secretes estrogen and progesterone. Estrogen stimulates growth and development of female accessory sex organs and secondary sex characters. Progesterone plays a major role in the maintenance of pregnancy as well as in mammary gland development and lactation.

After going through Class 11 Biology Chapter 22 - Chemical Coordination, which is the last chapter of the book, you must be able to answer a few questions which are mentioned below:

  • Q1. Give example(s) of:
    • (a) Hyperglycemic hormone and hypoglycemic hormone
    • (b) Hypercalcemic hormone
    • (c) Gonadotrophic hormones
    • (d) Progestational hormone
    • (e) Blood pressure lowering hormone
    • (f) Androgens and estrogens
  • Q2. Which hormonal deficiency is responsible for the following:
    • (a) Diabetes mellitus
    • (b) Goiter
    • (c) Cretinism

If you have any doubt in solving these questions by yourself then, don't worry NCERT Solutions for Class 11 Biology Chapter 22 - Chemical Coordination and integration is there for you.

Also, try to answer all the questions of this chapter which are given in the exercise, as it will help you to clear your base. Solutions for NCERT Class 11 Biology Chapter 22 - Chemical Coordination and integration also help you in the preparation of other competitive exams like NEET, JiPMER, and AIIMS. along with your school exam.

NCERT Solutions for Class 11 Biology Chapter 22 Chemical Coordination and integration- Solved Exercise Questions

NCERT Solutions for class 11 Biology


The Living World


Biological Classification


Plant Kingdom


Animal Kingdom


Morphology of Flowering Plants


Anatomy of Flowering Plants


Structural Organisation in Animals


Cell: The Unit of Life




Cell Cycle and Cell Division


Transport in Plants


Mineral Nutrition


Photosynthesis in Higher Plants


Respiration in Plants


Plant Growth and Development


Digestion and Absorption


Breathing and Exchange of Gases


Body Fluids and Circulation


Excretory Products and their Elimination


Locomotion and Movement


Neural Control and Coordination

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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