The Pap test detects cancer in the female reproductive tract by sampling cells from which area?

• A. Cervix
• B. Uterus
• C. Vagina
• D. Fallopian tubes

Answer: (A)

The key idea is that the Pap test screens for cervical cancer by collecting cells from the cervix, the narrow opening of the uterus that extends into the vagina. Cells are brushed from both the outer part of the cervix (the ectocervix) and the inside canal (the endocervical canal), especially at the transformation zone where most cervical precancers arise. This location is ideal because it is easily accessible during the exam and is where abnormal cells most often develop, making early detection possible.

Sampling from the uterus, vagina, or fallopian tubes isn’t done with a Pap smear. The uterus is inside the body, the vagina is a separate region, and the fallopian tubes are farther up and not reached by this procedure; different tests or procedures would be needed to sample those areas.