In which location does a sperm cell first fertilize an egg?

Question

In which location does a sperm cell first fertilize an egg??  
A. Cervix  
B. Ovary  
C. fallopian tube  
D. uterus

Accepted Answer

Correct Answer: (C)fallopian tube. 
Rationale: A sperm cell first fertilizes an egg in the fallopian tube.After ovulation, the egg is released from the ovary and enters the fallopian tube, where it remains viable for approximately 12–24 hours. Sperm cells travel from the vagina through the cervix and uterus into the fallopian tubes. Fertilization normally occurs in the ampullary region of the fallopian tube, where the sperm penetrates the egg to form a zygote. The newly formed zygote then travels to the uterus for implantation.A) CervixThe cervix is the lower, narrow portion of the uterus that opens into the vagina. Its role in reproduction is to allow sperm to pass from the vagina into the uterus and to protect the upper reproductive tract from infection.Although sperm must pass through the cervix to reach the upper reproductive organs, fertilization does not occur there. The cervix lacks the appropriate environment and anatomical conditions needed for sperm–egg fusion. Therefore, this option is incorrect.B) OvaryThe ovary is the organ responsible for producing and releasing eggs during ovulation. Each month, a mature egg is released from the ovary into the nearby fallopian tube.While the ovary is the origin of the egg, it is not the site of fertilization. Sperm do not typically enter the ovary, and fertilization does not occur within ovarian tissue. Instead, the egg must first travel into the fallopian tube before fertilization can take place. For this reason, this option is incorrect.C) Fallopian tubeThe fallopian tube is the normal and primary site of fertilization.After ovulation, the egg enters the fallopian tube, and sperm that have traveled through the female reproductive tract meet the egg in this location. Fertilization most commonly occurs in the ampulla, the widest part of the tube. Here, the sperm penetrates the egg’s outer layers, and their genetic material combines to form a zygote.This structure provides the ideal conditions for fertilization and early cell division before the developing embryo moves into the uterus. Therefore, this option is correct.D) UterusThe uterus is the site of implantation and fetal development, not fertilization.Once fertilization has occurred in the fallopian tube, the zygote divides and travels to the uterus, where it implants into the endometrial lining. The uterus supports the growth of the embryo and fetus throughout pregnancy but does not serve as the location where sperm and egg first unite. Thus, this option is incorrect.Conclusion:Fertilization requires the meeting of a sperm and an egg in an environment that supports their fusion and early development. The cervix serves as a passageway, the ovary releases the egg, and the uterus supports implantation and pregnancy. The fallopian tube is the only structure where fertilization normally occurs.Therefore, the correct answer is the fallopian tube.

In which location does a sperm cell first fertilize an egg?

A
Cervix

B
Ovary

C
fallopian tube

D
uterus

A sperm cell first fertilizes an egg in the fallopian tube.

Topic Flashcards

Mini Quiz

Related Questions

In which location does a sperm cell first fertilize an egg?

A Cervix B Ovary C fallopian tube D uterus

A sperm cell first fertilizes an egg in the fallopian tube.

Topic Flashcards

Mini Quiz

Related Questions

A
Cervix

B
Ovary

C
fallopian tube

D
uterus