What is the primary function of secretions from the prostate gland?

The main function of secretions from the prostate gland is to activate sperm and neutralize urine. The prostate gland produces a fluid that makes up a significant portion of semen, contributing to the overall volume and providing an optimal environment for sperm function. This fluid contains enzymes, citric acid, and other substances that help to nourish sperm and inhibit the growth of bacteria, creating a more favorable condition for sperm viability and motility.

Moreover, the prostate secretions help to neutralize the acidic environment of the female vagina, ensuring that sperm can swim effectively towards the egg for fertilization. Neutralizing urine is also crucial because the urethra serves a dual purpose in males—it carries both urine and semen. Therefore, the prostate's secretions significantly enhance the functionality and survival rate of sperm, which is why this option is considered the primary function of the prostate gland's secretions.

The other choices do not represent the main role of the prostate gland. For instance, while nutrients are important for sperm maturation, the epididymis is primarily responsible for storing and maturing sperm, not the prostate. Testosterone regulation is mainly managed by the testes and other endocrine factors, and while prostate secretions do contribute to the overall volume of semen, their primary role is