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What increases the surface area in the stomach?

A.

Rugae

B.

Microvilli

C.

Peritoneum

D.

Muscularis

Answer and Explanation

The Correct Answer is A

A. Rugae: The rugae are folds in the stomach lining that expand when the stomach fills with food, increasing surface area for digestion.

B. Microvilli: Microvilli increase surface area in the small intestine, not the stomach.

C. Peritoneum: The peritoneum is a membrane surrounding the abdominal cavity, not involved in surface area expansion of the stomach.

D. Muscularis: The muscularis is the muscle layer responsible for stomach contractions but does not increase surface area.


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Related Questions

Correct Answer is D

Explanation

A. Bacteria: Interferons are not primarily effective against bacteria; they are specific to viral infections.

B. Parasites: While some immune responses can involve interferons, they are not specifically targeted against parasites.

C. Fungi: Interferons have limited activity against fungal infections, making them less effective compared to their antiviral properties.

D. Viruses: Interferons are proteins produced by virus-infected cells that help to protect neighboring cells from viral infection by enhancing the immune response and inhibiting viral replication.

Correct Answer is C

Explanation

A. Endocardium: The endocardium is the innermost layer of the heart wall, lining the chambers and valves, and is not in contact with pericardial fluid.

B. Fibrous pericardium: This is the outermost layer of the pericardium but is not part of the heart wall. It provides protection and support but does not come into direct contact with pericardial fluid.

C. Epicardium: The epicardium is the outer layer of the heart wall and is in direct contact with pericardial fluid, which is found between the epicardium and the pericardium.

D. Myocardium: The myocardium is the middle muscular layer responsible for heart contractions and is not in contact with pericardial fluid.

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