Question

Release egg from the ovary is known as
(a) Ovipary
(b) Ovulation
(c) Hatching
(d) All of the above

Answer 1

Hint: Release of the egg occurs in each month, between day 6 and 14 of the menstrual cycle. The follicle-stimulating hormone causes the follicles in one of the ovaries to become mature. At about day 14 in the menstrual cycle, a sudden rise in the luteinizing hormone causes the release of an egg.

Complete step by step answer:
The biological process by which the egg is released from the ovary is known as ovulation. It is a phase in the menstrual cycle. It occurs on day 14 of a 28 days menstrual cycle. In primates, the sexual cycle ends in menstruation. In human females, it is regularly repeated from puberty to menopause. The menstrual cycle involves two separate cycles; ovarian cycle and uterine cycle. During the ovarian cycle, under the influence of FSH, a primary follicle matures to the Graafian follicle. Graafian follicle secretes estrogens, which inhibit the secretion of FSH and promote the production of LH. Shortly afterward the Graafian follicle collapses, leading to ovulation. This represents the ovulatory period. Ovulation occurs between, 13^th and 15^th days of the cycle.

Additional Information:
- Soon after ovulation LH stimulates the formation of corpus luteum. It in turn secrete progesterone.
- Progesterone inhibits the secretion of FSH and thus prevents the maturation of additional follicles.
- If fertilization and pregnancy follow, corpus luteum continues its functional existence. If fertilization does not occur corpus luteum atrophies.
So, the correct answer is 'Ovulation'.

Note:
- Ovarian cycle is the cycle of changes occurring in the ovary. It is completed in three steps; pre- ovulatory, ovulatory, and post- ovulatory.
- Uterine cycle is the cycle of changes taking place in the uterus. It consists of three stages, proliferation phase, secretory phase, and menstrual phase.
- Menstrual phase is present only in the absence of pregnancy. In the absence of pregnancy, the corpus luteum degenerates, progesterone secretion stops, and endometrium regresses and finally collapses. This results in menstrual flow.