Which of the following is true regarding the vagina?

Correct Answer: B

Rationale: The correct answer is B: The vagina transports sperm from the cervix to the uterus. This is because the vagina serves as the passageway for sperm to travel from the cervix through the uterus and into the fallopian tubes to fertilize the egg. The other choices are incorrect because: A) Fertilization typically occurs in the fallopian tubes, not the vagina. C) Estrogen is primarily produced by the ovaries, not the vagina. D) Sperm is not stored in the vagina after ejaculation, as it quickly travels through the cervix to reach the uterus.

Correct Answer: D

Rationale: The correct answer is D: Fallopian tube. The rationale is as follows: Sperm meets the egg in the fallopian tube during fertilization. The fallopian tube provides the ideal environment for fertilization to occur due to its structure and cilia movement that help transport the egg and sperm. The other options are incorrect because: A: Ovary is where the egg is produced but not where fertilization occurs. B: Cervix is the lower part of the uterus and allows passage of sperm into the uterus but not the site of fertilization. C: Uterus is where the fertilized egg implants and develops into a fetus, but not where fertilization occurs.

Correct Answer: C

Rationale: The cervix during pregnancy functions to prevent bacterial infection by forming a barrier between the uterus and the outside environment. This is crucial to protect the developing fetus from harmful bacteria. The other choices are incorrect because the cervix does not directly support fetal development, secrete estrogen, or store sperm during pregnancy.

Correct Answer: C

Rationale: The correct answer is C: Seminal vesicles. Seminal vesicles produce the fluid that nourishes and protects sperm. They contribute a significant portion of the volume of semen. The other choices are incorrect because: A: Epididymis stores and transports sperm, but does not produce nourishing fluid. B: Prostate gland secretes a thin, milky fluid that helps sperm mobility, but not the main nourishing fluid. D: Vas deferens transports sperm from the testes to the urethra, but does not produce nourishing fluid.

Correct Answer: A

Rationale: The correct answer is A: Testosterone. Testosterone is the primary male sex hormone responsible for the development of male secondary sexual characteristics such as facial hair, deep voice, and muscle growth. It is produced by the testes and plays a crucial role in male reproductive system function. Estrogen (B) is the primary female sex hormone, Progesterone (C) is involved in the menstrual cycle and pregnancy, and FSH (D) is a hormone that stimulates the production of sperm in males and eggs in females.