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प्रश्न
You have learnt that a characteristic feature of endocrine system is the presence of feed back loops. By this what is meant if hormone A stimulates gland ‘X’ to secrete hormone B, the production of ‘A’ could be modified when the level of B changes in our blood. An example is the relation between hormones LH and estrogen (E2). An old woman exhibits the following features. High levels of LH in blood but low levels of E2 in the blood. Another woman exhibits high level of LH in blood and also high level of E2 in the blood. Where is the defect in both these women? Provide suitable diagram to support this answer.
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उत्तर
If an old woman exhibits high levels of LH in her blood but low levels of E2 in the blood then it may be due to any abnormality in the anterior pituitary. If an old woman exhibits high levels of LH in blood and high levels of E2 in the blood then it may be due to any abnormality in the anterior pituitary or ovary.
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संबंधित प्रश्न
MULTIPLE CHOICE TYPE:
The secretion of ADH (anti-diuretic hormone) is inhibited by
(a) emotion and stress (b) nicotine (c) alcohol (d) morphine
Name the following:
Gland secreting growth hormone
Match the terms of column I with those of column II:
| Column I | Column II |
| (i) Adenohypophysis | (a) Thyroxine |
| (ii) Neurohypophysis | (b) STH |
| (iii) Thyroid | (c) Oxytocin |
| (iv) Adrenaline | (d) Insulin |
| (v) Islets of Langerhans | (e) Noradrenaline |
Which one of the following statement is true/ false?
Adrenaline is secreted by pituitary.
Which hormones are secreted by anterior pituitary gland?
State the Location
Pituitary gland
Sketch and label V.S of Pituitary gland.
Name the hormones which regulate water and mineral metabolism in man.
Match the following.
| Column I | Column II | ||
| i. | Insulin | p. | Addison's disease |
| ii. | Thyroxine | q. | Diabetes mellitus |
| iii. | Mineralocorticoids and Glucocorticoids | r. | Acromegaly |
| iv. | Growth Hormone | s. | Goitre |
All are peptide hormones, EXCEPT ______.
Identify the CORRECT set of hormones secreted by the adenohypophysis?
The secretion of hormones of adrenal medulla is regulated by ____________.
Select the mis-matched pair.
Continued secretion of milk is stimulated by
Inflammatory responses can be controlled by a certain steroid. Name the steroid, its source and also its other important functions.
Where is pituitary located?
Mention if the following statement is true (T) or false (F). If false, rewrite the correct word (not words) striking out the single wrong one.
Vasopressin secreted by anterior lobe controls reabsorption of water form kidney tubules.
Write the full form of LH.
Choose the odd one out from series and write the category of the remaining terms:
Given below is a group of terms. In the group the first pair indicates the relationship between the two terms. Suggest the suitable word(s) for the fourth place.
Undersecretion: Dwarfism:: Oversecretion : ______.
