
The structures that draw an ovulated oocyte into the female duct system are (a) cilia, (b) fimbriae, (c) microvilli, (d) stereocilia.

Introduction:
The process of ovulation is defined as the release of eggs from the overies. This event occurs in humans, when the ovarian follicles rupture and release the secondary oocyte ovarian cells. During the process of ovulation, fimbriae get activated and hit the ovary in a gentle and sweeping motion. The release of oocyte from ovary is takes place in peritoneal cavity and cilia of the fimbriae draw the ovum into the fallopian duct.
Answer to Problem 1MC
Correct answer:
The structures that draw an ovulated oocyte into the female duct system are Cilia
Fimbriae.
Explanation of Solution
Explanation for the correct answer:
The fimbriae are finger-like projections present at the end of the fallopian tube. During ovulation, the sex hormones accelerate the fimbriae and result in the inflammation. This causes a motion and allows the oocyte to release from the ovary. Cilia are present on the fimbriae and help in capturing oocyte into the uterine tube and finally toward uterus.
Explanation for the incorrect answers:
Option (c) states that microvilli are the structures that draw an ovulated oocyte into the female duct system. Microvilli are the cellular membrane protrusions that are present on the surface of the cells and their main function is the cellular adhesion. Hence this is an incorrect option.
Option (d) states that stereocilia are the structures that draw an ovulated oocyte into the female duct system. The stereocilia are present on the hair cells that shows the response to fluid motion in different types of animals for various functions, including hearing and balance. Hence this is an incorrect option.
Thus it is concluded that fimbriae are the finger-like projections present at the end of the fallopian tube and during ovulation, the sex hormones accelerate the cilia of fimbriae that causes a motion and allows the oocyte to draw into the fallopian tube.
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