1) Which of the following controls co-ordinating activities of human body?
(a) Hormones (b) Lungs (c) Kidney (d) None of these
Answers
Hormones control coordinating activities of the human body.
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Hormones controls co-ordinating activities of human body.
Explanation:
1. The correct choice of the asked question is Option (A) Hormones.
2. Hormones are defined as chemicals secreted in our body from various glands to control co-ordinating activities of our body and to regulate the activity of our cells and organs.
3. The glands which produces hormones are known as endocrine glands. Some examples of endocrine glands are: Hypothalamus, pituitary gland, thyroid gland, pancreas, pineal gland, parathyroid gland, etc.
4. It is important to note that testes and ovaries acts as both reproductive organs and also as endocrine glands. It is because these produces gametes essential for reproduction and also secretes different hormones and acts as an endocrine gland.
5. Some examples of hormones secreted by glands are as follows:
• Thyroid gland- It produces 3 hormones. These are: thyroxine, triiodothyronine and calcitonin.
• Parathyroid gland- It produces parathormone which is essential for regulating the level of calcium in blood.
• Pancreas- It produces insulin and glucagon which maintains the sugar levels in our blood.
6. Deficiency or oversecretion of hormones in our body produces many diseases. For example: oversecretion of insulin by pancreas causes diabetes, deficiency of growth hormone from pituitary gland causes dwarfism.
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