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The tubular structure of the uterus that projects a short distance into the vagina is called the_

A.

Cervix

B.

Perimetrium

C.

Vestibule

D.

External os

Answer and Explanation

The Correct Answer is A

A. Cervix: The narrow, tubular, inferior portion (“neck”) of the uterus that protrudes into the vagina; it contains the external os.

B. Perimetrium: The outer serosal covering of the uterus (visceral peritoneum); not a tube and doesn’t project into the vagina.

C. Vestibule: The external genital space between the labia minora with the urethral and vaginal openings; not part of the uterus.

D. External os: Merely the opening of the cervix into the vagina—not the entire projecting tubular structure.


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Related Questions

Correct Answer is A

Explanation

A. Pap Smear:The Papanicolaou (Pap) smear screens cervical cells for precancerous changes (dysplasia) and is the standard test for early detection of cervical cancer.
B. BRCA test: BRCA genetic tests assess hereditary breast/ovarian cancer risk (BRCA1/2), not cervical cancer screening.
C. ELISA test: ELISA is a lab technique for detecting antibodies/antigens (used in many contexts, e.g., HIV testing) but is not a routine screening test for cervical cancer.
D. Mammogram:A mammogram is an imaging test used to screen for breast cancer, not cervical cancer.

Correct Answer is C

Explanation

A. "It is an enzyme released into the duodenum.":Salivary amylase is secreted into the mouth; pancreatic amylase is released into the duodenum.
B. "It is an enzyme that breaks down the fats in breast milk.":Salivary amylase digests starches (carbohydrates); lingual lipase (and gastric/pancreatic lipases) act on fats.
C. "It is an enzyme that initiates the breakdown of carbohydrates.":Salivary amylase begins starch digestion in the oral cavity by cleaving polysaccharides into smaller sugars.
D. "It is an enzyme that breaks down proteins in the stomach.":Proteolysis in the stomach is primarily by pepsin (a gastric enzyme), not salivary amylase.

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