Final answer:
Contractions of the bulbospongiosus muscles result in ejaculation, which is the forceful expulsion of semen from the body during the orgasm phase of the sexual response cycle.
Step-by-step explanation:
The contraction of the bulbospongiosus muscles plays a critical role during the sexual response cycle, particularly during the orgasm phase. When these muscles contract, they facilitate the expulsion of semen from the urethra, which occurs after the ejaculatory duct and other reproductive accessory glands have placed semen in the urethra. Therefore, the contractions of the bulbospongiosus muscles result in ejaculation. This process is part of the male sexual response that includes erection, emission of semen into the urethra, and ejaculation, the latter being the forceful expulsion of semen from the body.