One Minute Revision|Phases Of Gametogenesis|Formation Of Ovarian Or Graafian Follicle|Structure Of Ovum|Spermatogenesis Vs Oogenesis

Structure OF Ovary || Formation OF Ovarian or Graafian Follicle

Oogenesis|Formation Of Ovarian Or Graafian Follicle|Formation Of Corpus Luteum And Its Fate|Structure Of Ovum|OMR

Hymen|Mammary Gland|OMR|Gametogenesis - Oogenesis|Structure Of Ovum|OMR|Spermatogenesis Vs Oogenesis|Summary

Phases Of Gametogenesis|Oogenesis|Spermatogenesis Vs Oogenesis|OMR

The endocrinal structure formed after ovulation (release of ovum from the Graafian follicle) is

Given below are the steps involved in oogenesis . Arrange them in proper sequence and select the correct option. 1. Formation of primary follicle due to development of granulosa cells. 2 Division of oogonia and formation of the primary oocyte. 3. Formation of follicles having antrum . 4. Formation of secondary follicles. 5. An unequal division leading to the formation of secondary oocyte i.e. ovum and the first polar body .

Given below are four statement (A-D) each with one of two blanks .Select the option which correctly fill up the blanks in two statements A The human male ejaculates about (i) million sperms during a cooitus . Out of which for normal fertility at teast (iii) percent sperms must have normal shape and size B. A primary spermatocyte completes (i) meiotic division leading to the formation of two equal haploid cells called (i) C. Spermatogenesis starts at the age of (i) due to significant increase in the secretion of (ii) a hypothalamic hormone D. Oogenesisi is initiated during embryonic development and at puberty only (i) primary follicles are left in each overy

(a) Explain the menstrual phase in a human female. State the levels of ovarian and pituitary hormones during this phase. (b) Why is follicular phase in the menstrual cycle also referred as proliferative phase ? Explain. (c) Explain the events that occur in a graafian follicle at the time of ovulation and thereafter. ltbvrgt (d) Draw a graafian follicle and label antrum and secondary oocyte.

Assertion: Estrogen produces wide ranging actions such as stimulation of growth and activities of female secondary sex organs, appearance of female secondary sex characters, development of growing ovarian follicles and mammary gland development. Reason: Progesterone acts on the mammary glands and stimulates the formation of alveoli (sac-like structure which store milk) and milk secretion.