Chemical Coordination and Integration
Your heart pounds before an exam, you feel sleepy at night and you grow taller for years, and none of this needs a nerve to carry a message all the way. Glands send chemical messengers through the blood. In this chapter you meet the hypothalamus and the pituitary, the thyroid, the adrenal glands, the pancreas and the gonads, learn what each hormone does and what happens when it is too little or too much, and see how a hormone reaches a cell. Python models the feedback loops. It serves the Indian syllabus (NCERT, NEET) and the matching topic of A-Level, IB and AP.
Part of Biology · High School (11–12) (chapter 18)
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Hormones, the Hypothalamus, the Pituitary and the Thyroid
What a hormone is and why the body needs a second control system beside the nerves. How the hypothalamus controls the pituitary, what each pituitary hormone does, and what the pineal and thyroid glands add. Goitre, cretinism, gigantism and diabetes insipidus are explained as hormone slips.
The Adrenal Gland, the Pancreas, the Parathyroid, the Thymus and the Gonads
How the adrenal glands prepare the body for an emergency and keep the salts in balance. How insulin and glucagon hold the blood sugar steady, and what goes wrong in diabetes mellitus. Then the parathyroid and the calcium of the blood, the thymus, and the hormones of the testis and the ovary.