Which part of the male reproductive system is responsible for producing seminal fluid?

Correct Answer: A

Rationale: The correct answer is A: Seminal vesicles. Seminal vesicles are responsible for producing seminal fluid, which makes up the majority of semen. They secrete a fluid rich in fructose and other nutrients to provide energy for sperm. The other choices are incorrect because the prostate gland produces a milky fluid that aids in sperm motility but is not the primary producer of seminal fluid. The epididymis stores and transports sperm, and the testes produce sperm cells through spermatogenesis, but neither of these structures is responsible for producing seminal fluid.

Correct Answer: C

Rationale: Rationale: Prolactin is the hormone responsible for stimulating the production of breast milk after childbirth. It is produced by the pituitary gland and plays a key role in lactation. Estrogen and progesterone are involved in the menstrual cycle and pregnancy but not specifically in milk production. Oxytocin is responsible for milk ejection (letdown reflex) but not the production of milk itself. Therefore, the correct answer is C: Prolactin.

Correct Answer: C

Rationale: The correct answer is C: Fallopian tube. Fertilization typically occurs in the fallopian tube, where sperm meets the egg. The fallopian tube provides a suitable environment for fertilization to take place due to its proximity to the ovary, where ovulation occurs. Sperm travel through the fallopian tube to reach the egg, and once fertilization occurs, the resulting zygote then travels down to the uterus for implantation. Incorrect answers: A: Uterus - Fertilization does not occur in the uterus as it is the site for implantation of the fertilized egg. B: Ovary - Ovulation occurs in the ovary, but fertilization usually takes place in the fallopian tube. D: Cervix - The cervix serves as the entrance to the uterus and does not play a role in fertilization.

Correct Answer: B

Rationale: Correct Answer: B - Provide oxygen and nutrients to the fetus Rationale: 1. The placenta is the organ that connects the developing fetus to the uterine wall, allowing for the exchange of nutrients, oxygen, and waste products. 2. It contains blood vessels that transport oxygen and nutrients from the mother to the fetus. 3. The placenta also filters out harmful substances and waste products from the fetus. 4. Providing oxygen and nutrients is crucial for the growth and development of the fetus during pregnancy. Summary: A: Incorrect - The placenta does help in removing waste products but its primary function is not excretion. C: Incorrect - While the placenta does support implantation by attaching the embryo to the uterine wall, its main purpose is not implantation. D: Incorrect - While the placenta does produce hormones like estrogen, its primary function is to provide essential nutrients and oxygen to the fetus.

Correct Answer: C

Rationale: The primary function of the seminiferous tubules in males is to produce sperm. Sperm production, known as spermatogenesis, occurs within the seminiferous tubules through a series of cell divisions and maturation processes. This process is essential for male fertility and reproduction. Therefore, choice C is correct. Choice A (Produce seminal fluid) is incorrect because seminal fluid is primarily produced by the seminal vesicles and prostate gland. Choice B (Mature sperm) is partially correct but not the primary function of the seminiferous tubules. While sperm maturation does occur in the epididymis, the main role of the seminiferous tubules is sperm production. Choice D (Secrete testosterone) is incorrect because testosterone is primarily produced by the Leydig cells in the testes, not in the seminiferous tubules.