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प्रश्न
What are the general properties of hormones?
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उत्तर
General properties of hormones:
- Hormones are secreted by the endocrine glands.
- Hormones are specific in function.
- Hormonal actions are long lasting.
- Hormones are required in very minute quantities.
- They are secreted independent of one another.
- They act as chemical co-ordinators or chemical messengers.
- They are proteinaceous or steroid in nature..
- They are secreted in response to specific stimuli.
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संबंधित प्रश्न
Give an example of a progestational hormone.
add a note on deficiency of thyroxine.
A gland having endocrine as well as exocrine function is
Give the Technical Term: Name the hormones which lead to the following condition: Growth of beard in women
Column ‘II’ is a list of items related to ideas in Column ‘I’. Match the term in Column ‘II’ with a suitable idea given in Column ‘I’.
| Column A | Column B |
| (i) Pituitary | (a) produces male sex characteristics |
| (ii) Ovaries | (b) decreases blood sugar level |
| (iii) Thyroid | (c) increases heart and breathing rate raises blood pressure |
| (iv) Thymus | (d) produces female sex characteristics |
| (v) Adrenals | (e) is known as emergency hormone |
| (vi) Hypothalamus | (f) regulates the level of calcium and phosphorus |
| (vii) Pancreas | (g) increases the rate of metabolism |
| (viii) Testes | (h) maintains the level of calcium |
| (ix) Parathyroid | regulates the amount of water excreted in the urine. |
| (x) Cretinism | (j) simulates skeletal growth |
| (xi) Diabetes mellitus | (k) regulates the activities of other glands |
| (xii) Insulin shock | (l) stimulates the development of male and female sex organs |
| (xiii) Gigantism | (m) Shortage of glucose in the blood. |
| (xiv) Enlargement of breasts in adult males | (n) Over-secretion of growth hormone |
| (xv) Exophthalmic goiter | (o) Excess of glucose in the blood |
| (xvi) Acromegaly | (p) Over-secretion of thyroxin |
| (xvii) Addison’s disease | (q) Dwarfism and mental retardation |
| (xviii)Cretinism | (r) Over-secretion of cortical hormones |
| (xix) Dwarfism | (s) Under-secretion of the adrenal cortex |
| (xx) Adrenalin | (t) Under-secretion of thyroxin in children |
| (xxi) Vasopressin | (u) Over-secretion of growth hormones in adults |
Spermatogenesis in mammalian testes is controlled by ______.
Comment on Acini of thyroid gland.
Label the endocrine glands in the given figure.
Which of the following organs in mammals does not consist of a central meduallary’ region surrounded by a cortical region?
Which one of the following statements is correct?
