NCERT Solutions for class 11 Biology Chapter 22: Chemical Coordination and Integration

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NCERT Solutions for Class 11 Biology Chapter 22 Chemical Coordination and Integration are provided in the article below. It includes 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:

  • Endocrine glands and hormones
  • Human endocrine system
  • Role of hormones as messengers and regulators, hypo – and hyperactivity and related disorders
  • Dwarfism, acromegaly, cretinism, goiter, exophthalmic goiter, diabetes, Addison’s disease.

Expected no. of Questions: 2 questions of around 2-3 marks.

Download PDF: NCERT Solutions for Class 11 Biology Chapter 22 Chemical Coordination and Integration


NCERT Solutions for Class 11 Biology Chapter 22

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Class 11 Biology Chapter 22 Chemical Coordination and Integration: Important Topics

Everything on this earthworks in coordination with some other thing, whether it’s a heavy vehicle, any electronic device, or a Human Body. Our Bodies from inside to outside are inter-connected and coordinate with each other to work. What if someday you get a heart attack? What if someday u are unable to hear, speak, run, sense? What if you get collapsed someday during School assembly? This all happens because our body is internally chemically coordinated, and due to many reasons the coordination gets fails, and you fall ill. So, chemical coordination and integration are very much necessary. Good food, regular exercise, timely medical check-ups, and a healthy hygienic lifestyle will add value to your body’s coordination.

  • Endocrine glands and hormones

The endocrine glands in animals are the hypothalamus, the pituitary gland, the pineal gland, the thyroid, the parathyroid, the thymus, the pancreas, the adrenal gland, and the gonads. 

Different endocrine glands along with the hormone they release are given below:

  • Hypothalamus- The hypothalamus secretes various releasing hormones like gonadotropin-releasing hormones, growth-hormone-releasing hormones. 
  • Pituitary Gland- Hormones released by this gland are growth hormone, thyroid-stimulating hormone, LH, FSH etc.
  • Pineal Gland- It releases the hormone called melatonin.
  • Thyroid Gland- It releases the hormones triiodothyronine (T3) and thyroxine (T4). 
  • Parathyroid Gland- The hormone released by this gland is parathormone.
  • Pancreas- The pancreas secretes hormones like glucagon, and insulin and these two balance the blood sugar level in the body.
  • Adrenal glands- The cortex region secretes the hormones cortisol, aldosterone, and androgens while the medulla region secretes the hormones adrenaline and noradrenaline.  
  • Gonads- secretes the hormone testosterone.
Chapter Related Links:
Mechanism Of Hormone Action Symptoms of Thyroid  Pituitary Gland
Goiter Thyroid Glands Endocrine Glands
Luteinizing Hormone Thyroid Cancer Gonads

CBSE Class 11 Biology Study Guides:

CBSE CLASS XII Related Questions

  • 1.

    "Indo-Burma" is considered as a hotspot. What is meant by the term "hotspots" in biodiversity ? List two criteria used for determining a "hotspot". Name any two hotspots of India.


      • 2.
        In Pisum sativum, the flower colour may be violet (V) or white (v). What proportion of the offspring in a cross of "VV × vv" would be expected to be violet?

          • 25%
          • 50%
          • 75%
          • 100%

        • 3.
          Choose a correct option that shows an interaction in which one species benefits while the other is neither harmed nor benefitted.

            • Mycorrhizal associations between fungi and roots of higher plants
            • Sea anemone and clownfish
            • Abingdon tortoises and goats in the Galapagos Island
            • Cuscuta on hedge plants

          • 4.
            Assertion (A) : The milk produced by transgenic cow 'Rosie' was nutritionally more balanced product for human babies than natural cow milk.
            Reason (R) : It was human protein enriched milk containing human alpha lactaglobulin.

              • Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
              • Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
              • Assertion (A) is true, but Reason (R) is false.
              • Assertion (A) is false, but Reason (R) is true.

            • 5.

              Which of the following is a secondary consumer ?

                • Grasshopper
                • Cow
                • Fish
                • Hawk

              • 6.
                Identify the plant in which emasculation is not required for artificial hybridization.

                  • Rice
                  • Wheat
                  • Pea
                  • Papaya
                CBSE CLASS XII Previous Year Papers

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