Question

Primary follicles develop into secondary follicles, one follicle matures and becomes a graafian follicle is known as _____

O Follicular phase
O Ovulation
O Luteal phase

Answer 1

The phase in which primary follicles develop into secondary follicles and one matures into a Graafian follicle is called the follicular phase. This is the first phase of the ovarian cycle and involves the rise of FSH leading to the maturation of one dominant follicle ready for ovulation.

Step-by-step explanation:

The maturation process of ovarian follicles in which primary follicles develop into secondary follicles, and one follicle eventually matures into a Graafian follicle, is known as the follicular phase. The follicular phase is the initial phase of the ovarian cycle, usually lasting 12 to 14 days in a typical 28-day menstrual cycle. During this phase, triggered by a rise in follicle-stimulating hormone (FSH) from the pituitary gland, several ovarian follicles begin to mature. However, typically just one follicle, the Graafian follicle, fully matures and readies to release an egg, while the others ultimately disintegrate.

During the follicular phase, the maturing follicles also release estrogen, which increases as the phase progresses. Folliculogenesis is the overarching process where ovarian follicles, each containing an oocyte and supporting cells, grow and develop. Most follicles will not reach full maturity, with about 99 percent undergoing atresia at various stages of development. The mature Graafian follicle eventually ruptures to release the oocyte in an event known as ovulation. Following ovulation, the remnants of the ruptured follicle develop into the corpus luteum.