What do seminal vesicles secrete?

What do seminal vesicles secrete?

• A. Alkaline, viscous liquid (60% semen volume)
• B. Alkaline, watery secretion (30%)
• C. Acidic, watery secretion
• D. Mucus-rich secretions

Answer: (A)

Seminal vesicle secretions form the majority of the semen and are specialized to support sperm in the female reproductive tract. The fluid is alkaline and viscous, which helps neutralize the acidic vaginal environment and provides a protective, gel-like medium after ejaculation. This secretion makes up about 60% of semen and is rich in fructose to provide energy for sperm, along with components like prostaglandins that help propel sperm through the tract and factors that promote coagulation of semen to keep it in place initially. Other secretions that are watery or acidic, or mucus-rich for lubrication, do not match this combination of alkaline pH, viscosity, and substantial contribution to semen volume.

Seminal vesicle secretions form the majority of the semen and are specialized to support sperm in the female reproductive tract. The fluid is alkaline and viscous, which helps neutralize the acidic vaginal environment and provides a protective, gel-like medium after ejaculation. This secretion makes up about 60% of semen and is rich in fructose to provide energy for sperm, along with components like prostaglandins that help propel sperm through the tract and factors that promote coagulation of semen to keep it in place initially. Other secretions that are watery or acidic, or mucus-rich for lubrication, do not match this combination of alkaline pH, viscosity, and substantial contribution to semen volume.