Question

After ovulation graafian follicle regressed into
A. Corpus callosum
B. Corpus artesia
C. Corpus albicans
D. Corpus luteum

Answer 1

Hint: The Graafian follicle is the stage of the follicle that occurs after the first meiotic division but before ovulation. As a result, it has a $$2N$$ haploid oocyte. IIt has a large follicular antrum that occupies most of the follicle. The secondary oocyte is positioned eccentrically after the first meiotic division. It is surrounded by the zona pellucida and the corona radiata, a layer of numerous cells. The ovum will have three layers when it is expelled from the Graafian follicle and into the oviduct: oocyte, zona pellucida, and corona radiata.

Complete answer:
Option A: The corpus callosum, a large bundle of nerve fibres that connects the two hemispheres of your brain, ensures that both sides of the brain can communicate and transmit signals to each other.
So, option A is not correct.
Option B: The ovarian follicles, which are made up of an oocyte surrounded by granulosa cells and internal and external theca cells, are broken down in follicular atresia.
So, option B is not correct.
Option C: Simply described, the corpus albicans is a scar on the surface of the ovary caused after ovulation. The corpus albicans was once a robust endocrine organ called the corpus luteum that functioned to maintain the growing foetus before degeneration into scar tissue.
So, option C is incorrect.
Option D: The Graafian follicle becomes the corpus luteum after ovulation. Progesterone is produced by the corpus luteum and is needed to keep the endometrium healthy during implantation and pregnancy. The Corpus callosum is a nerve fibre tract in the brain that runs beneath the cerebral cortex. When the corpus luteum degenerates in the absence of fertilisation, the corpus albicans develops as a regressed variant of the corpus luteum.
So, option D is correct.

Hence, Option D is correct.

Note:
Menstrual cycle includes ovulation. When an egg is released from your ovary, this happens.
The egg may or may not be fertilised by sperm when it is released. If the egg is fertilised, it may travel to the uterus and implant, resulting in a pregnancy. The egg disintegrates and the uterine lining is lost during your period if it is not fertilised.
Ovulation usually occurs on the $${14}^{th}$$ day of a $$28$$-day menstrual cycle. However, because not everyone has a $$28$$-day cycle, the exact date may differ.
Ovulation usually occurs four days before or four days after the midpoint of your cycle.