Question

The fimbriae of the fallopian tube help in _____.

• A. collection of secondary oocytes after ovulation
• B. making necessary changes in endometrium for implantation
• C. release of ovum from Graafian follicle
• D. development of the embryo

Answer 1

The correct option is A

collection of secondary oocytes after ovulation

The correct option is A.
Explanation of the correct option:

1. Secondary oocytes are immature oocytes that develop from ovulation to fertilization and mature into an ootid.
2. Ovulation is the process through which a developed egg is expelled from the ovary.
3. The egg is released and travels down the fallopian tube, where it can be fertilized for 12 to 24 hours.
4. The uterine tube fimbriae, also known as fimbriae tube, are short, fingerlike extensions at the end of the fallopian tubes that transport eggs from the ovaries to the uterus.
5. The ovary is linked to the fimbriae.
6. Oocytes are transported from the ovary to the uterus via the fallopian tubes.
7. The released egg is caught by fimbriae (finger-like structures) near the ovary and waved along the tube by cilia (tiny hair-like projections).
8. Fertilization usually takes occurs in the fallopian tube's ampulla region.
   

Explanations of the incorrect options:
Option B:

1. Preparation for implantation, pregnancy maintenance if implantation happens, and menstruation in the absence of pregnancy are the physiological functions of the uterine endometrium (uterine lining).
2. As a result, the endometrium is critical to the reproduction and survival of our species.
3. Another common way for endometrial preparation is exogenous oestrogen and progesterone treatment (with or without a gonadotrophin-releasing hormone (GnRH) agonist), commonly known as the artificial cycle, and is frequently used as an alternative to the natural cycle.

Option C:

1. The fully grown follicle that ruptures and discharges the ovum during the ovulatory phase is known as a Graafian follicle.
2. Following ovulation, the Graafian follicle converts into the corpus luteum, which secretes progesterone and is necessary for pregnancy maintenance.
3. An antral follicle is an ovarian follicle that forms near the end of the folliculogenesis process.
4. It is also known as a Graafian follicle or a tertiary follicle.
5. "Folliculogenesis" refers to the process through which a follicle forms, grows through numerous phases, eventually releases the mature oocyte, and transforms into a corpus luteum (CL).
6. Eggs released from Graafian follicles enter the oviduct (Fallopian tube) opening (ostium) and travel to the lower ampulla area, where fertilization occurs.
7. For 8-12 hours after ovulation, mouse eggs can be fertilised and give birth to normal children.

Option D:

1. The early developmental stage of an animal while it is in the egg or within the mother's uterus.
2. In humans, the word refers to the unborn kid until the end of the seventh week after conception; beyond the eighth week, the unborn child is referred to as a foetus in the early stages of human development
3. The zygote first grows into a solid ball of cells.
4. The blastocyst develops into a hollow ball of cells.
5. A blastocyst is a fertilised egg's clump of dividing cells.
6. It's an embryo in its early stages.
7. A blastocyst is one of the steps that lead to pregnancy.
8. Five to six days after a sperm fertilises an egg, a blastocyst develops.
9. The blastocyst implants in the uterine wall and develops into an embryo, which is attached to a placenta and covered by fluid-filled membranes.

Final answer: The fimbriae of the fallopian tube help in the collection of secondary oocytes after ovulation.