Final answer:
True, the prostate gland is located below the urinary bladder and on the upper end of the urethra, and it plays a key role in the production of components of semen.
Step-by-step explanation:
The statement that the prostate gland is located below the urinary bladder and on the upper end of the urethra is True. The prostate is a walnut-sized organ that surrounds the prostatic urethra, which is the portion of the urethra running within the prostate. This gland is crucial for male reproductive health as it secretes a slightly alkaline fluid that constitutes about 30 percent of the total volume of semen, containing proteins, enzymes, and a high concentration of zinc. The prostate fluid helps in the coagulation and subsequent liquification of semen following ejaculation, thus aiding in sperm viability and mobility within the female reproductive tract.