Chemical Coordination and Integration
Nerves act fast, but hormones carry slower lasting messages. This chapter in NCERT Class 11 Biology, Chapter 19, introduces endocrine glands and hormones of humans, including hypothalamus, pituitary, thyroid, parathyroid, adrenal, pancreas, gonads, thymus and pineal. It explains feedback control, hormone action through receptors and second messengers, and disorders from dwarfism and goitre to diabetes and Addison disease. You will learn how neural and hormonal systems together maintain steady internal conditions.
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