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प्रश्न
Describe any four hormones secreted by Adenohypophysis.
Name any four hormones secreted by adenohypophysis and give their significance.
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उत्तर
- Somatotropic Hormone (STH)/Somatotropin/Growth Hormone (GH): Secretion of GH is high till puberty later its secretion becomes low. However, it is continuously secreted throughout life for repair and replacement of body tissue or cells.
Functions:
- It stimulates growth of the body and development of all tissues.
- It accelerates protein synthesis and cell division.
- It stimulates the release of growth hormone.
- Thyroid Stimulating Hormone (TSH)/Thyrotropin: TSH causes the thyroid glands to absorb more iodine for the production of thyroxine. Thyroxine is released as the colloid breaks down.
- Adrenocorticotropic Hormone (ACTH)/Adrenocorticotropin:
- It stimulates the adrenal cortex to produce its hormones.
- It maintains the functioning of the adrenal cortex.
- Prolactin/Luteotropin/ Mammotropin: Secretion of this hormone is regulated by PIF (Prolactin inhibiting factor) of the hypothalamus.
Functions:
- Activates the growth of mammary glands during pregnancy (mammotropin).
- Stimulates milk production and secretion of milk (lactogenic) by mammary gland after child birth.
- Maintenance of the corpus luteum (luteotropin) so that it keeps on secreting progesterone during pregnancy.
- Gonadotropin:
- Follicle stimulating hormone: In females, it promotes the development of ovarian follicles, whereas in males, it promotes the development of seminiferous tubules.
- Luteinizing hormone (LH): LH aids in female ovulation. It stimulates the testes to create testosterone in males. As a result, LH in males is also known as ICSH.
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संबंधित प्रश्न
Give the special function of the following:
Somatotrophic hormone
The pituitary is called the master gland.
Very very short answer question.
What is the cause of abnormal elongation of long bones of arms and legs and of the lower jaw?
Give the names of the hormones released by neurohypophysis.
A boy shows excessive thirst and micturition because of deficiency of a hormone secreted by neurohypophysis. Name the disease he is suffering from.
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 |
Which of the following disorders is related to hyperactivity of the pituitary gland?
The posterior pituitary gland is NOT a 'true' endocrine gland because ______.
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.
Name the following:
Six hormones secreted from anterior pituitary.
The diagram given alongside shows an endocrine gland in the human body. Study the diagram and answer the following questions:
 |
- 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.
