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प्रश्न
The diagram given alongside shows an endocrine gland in the human body. Study the diagram and answer the following questions:
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- Identify the gland. Write its specific location in the human body.
- Label the guidelines 1, 2 and 3 shown in the figure.
- Name any two secretions from part 1 and two from part 2.
- The deficiency of which hormone causes Diabetes insipidus? How is this condition different from Diabetes mellitus with respect to the abnormal substances present in the of urine.
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उत्तर
- The pituitary gland is shown above. A small projection hangs from the base of the midbrain, below the hypothalamus.
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- Anterior Pituitary
- Posterior Pituitary,
- Hypophyseal stalk
- Hormones produced by the anterior pituitary gland, including TSH. Posterior pituitary hormones include antidiuretic hormone (ADH) and oxytocin.
- Diabetes insipidus is caused by antidiuretic hormone deficiency. In this disease, the urine does not include glucose. However, in Diabetes mellitus, glucose is present in the urine.
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संबंधित प्रश्न
Name the following:
Growth hormone.
Describe any four hormones secreted by Adenohypophysis.
State whether true or false:
Pars distalis produces six trophic hormones.
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.
Illustrate the differences between the mechanism of action of a protein and a steroid hormone.
Spermatogenesis is induced by ______.
Match the hormones with their source :
| Column A | Column B | ||
| (1) | Glucagon | (i) | Neurohypophysis |
| (2) | Adrenaline | (ii) | Islets of Langerhans |
| (3) | Somatotropins | (iii) | Adenohypophysis |
| (4) | ADH | (iv) | Medulla |
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.
Pituitary is of the size of a lemon.
Oxytocin stimulates the contraction of ______.
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 : ______.
