Gross Anatomy II Palmer Exam 4 Complete Practice 2026

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Which description matches the transitional zone of the prostate?

Around the urethra closely surrounding; comprising 5-10% of normal prostate volume

Located posteriorly and forms the main body of the prostate (65%)

Centrally surrounding the urethra, comprising 5-10% of normal prostate volume

The transitional zone is the periurethral tissue that encircles the prostatic urethra as it runs through the prostate. In a normal gland, this zone makes up about 5–10% of total prostate volume. Its central position around the urethra is why it enlarges in benign prostatic hyperplasia, constricting the urethral lumen and causing symptoms. This location distinguishes it from the peripheral zone (posterior, largest portion) and the central zone (around the ejaculatory ducts).

Surrounds the bladder neck

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