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प्रश्न
Describe the role of pituitary and ovarian hormones during the menstrual cycle in a human female.
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उत्तर
Follicle-stimulating hormone (FSH) and luteinising hormone are pituitary hormones. Oestrogen and progesterone are ovarian hormones.
Functions of pituitary and ovarian hormones:
| Hormone | Functions |
| FSH | i. Stimulates the ovarian follicles to secrete oestrogen. ii. Stimulates the proliferation of the endometrium of the uterine wall. iii. Stimulates the maturation of Graafian follicles. |
| LH | i. Stimulates the release of ovum. ii. Develops corpus luteum and secretion of progesterone. iii. Maintains pregnancy |
| Oestrogen | i. Controls the changes in the secondary sex organs in the first half of the menstrual cycle. ii. Stimulates growth, maturation and functions of secondary sex organs. iii. Repairs the damaged tissues of the uterus and fallopian tubes after menstruation. iv. Stimulates the maturation of ova development of uterine lining and mammary glands. |
| Progesterone | i. Facilitates the preparation of the endometrium for implantation. ii. Inhibits the contraction of the uterus and the development of new follicles. |
संबंधित प्रश्न
Explain the role of pituitary and the ovarian hormones in menstrual cycle in human females
Explain the events that occur in a graafian follicle at the time of ovulation and thereafter.
Sketch the labelled diagram.
Menstrual cycle
Mention, if the following statement is True or False. If false rewrite the wrong statement in its correct form:
Menarche is the stoppage of menstruation.
The luteal phase of the menstrual cycle is also called the secretory phase. Give reason.
The life of corpus luteum is generally about ______ days in the absence of pregnancy
Calculate the number of spermatozoa produced by a single primary spermatocyte.
Which hormone is secreted by the developing secondary follicles?
When does the corpus luteum degenerate?
Spermatogenesis is induced by ______.
