Concept:Semen is not just a vehicle for sperm; it contains bioactive molecules that actively manipulate the female reproductive tract.
Solution:- The seminal vesicles contribute about 60% of the seminal fluid volume.
- This fluid contains prostaglandins.
- Upon entering the female reproductive tract, prostaglandins stimulate reverse peristaltic contractions in the smooth muscles of the uterus and fallopian tubes. These contractions actively facilitate the transport of sperms upward toward the egg.
Why other options are incorrect:Androgens and testosterone are primarily blood-borne systemic hormones. Oxytocin causes uterine contractions but is released by the female's posterior pituitary, it is not the active agent delivered within semen.
Quality & Fidelity Assurance:
Every question on BeambePrep is rigorously curated against the official PMDC syllabus with zero filler, zero out-of-syllabus content, and zero typos. When an authentic past paper originally contained a historical mistake or ambiguity from the examining board (such as UHS or NUMS), BeambePrep faithfully reflects the original paper while detailing the nuance and scientific consensus in the autopsy above.