Question

Select the appropriate words to fill in the blanks.

• A. i granulosa cells ii zona pellucida iii secondary iv tertiary
• B. i zona pellucida ii theca interna iii tertiary iv secondary
• C. i theca interna ii granulosa cells iii secondary iv tertiary
• D. i zona pellucida ii theca interna iii secondary iv tertiary

Answer 1

The correct option is A

i granulosa cells ii zona pellucida iii secondary iv tertiary

During the developmental stages of the ovarian follicles when the primordial follicle gets surrounded by a few more layers of granulosa cells, it forms the primary follicle. These primary follicles grow in size under the influence of FSH and LH. Spindle shaped cells from the ovarian interstitium accumulate around the granulosa cells to form another layer of cells called the theca. The formation of the secondary follicle is marked by this thecal layer getting differentiated into inner theca interna and outer theca externa. Upon further development, cells of theca interna and the granulosa cells secrete estrogen-rich fluid which starts accumulating internal to the theca interna leading to the formation of the antral cavity. The formation of the antral cavity marks the formation of the tertiary follicle.