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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. Lipids and proteins: While bile is involved in fat digestion, it does not emulsify proteins.

B. Proteins: Bile does not emulsify proteins. Proteins are broken down by enzymes like pepsin.

C. Carbohydrates and proteins: Bile has no role in the digestion of carbohydrates or proteins.

D. Lipids: Bile emulsifies lipids, breaking them into smaller droplets to facilitate enzymatic digestion by lipases.

Correct Answer is A

Explanation

A. Tunica vaginalis, tunica albuginea, seminiferous tubules: The tunica vaginalis is the outer protective layer, followed by the tunica albuginea (a tough fibrous layer), and then the seminiferous tubules, where sperm production occurs.

B. Tunica vaginalis, seminiferous tubules, tunica albuginea: The seminiferous tubules are deeper than the tunica albuginea, making this order incorrect.

C. Tunica albuginea, tunica vaginalis, seminiferous tubules: This reverses the outer layers, as the tunica vaginalis is superficial to the tunica albuginea.

D. Seminiferous tubules, tunica vaginalis, tunica albuginea: This order is incorrect, as the tunica vaginalis and tunica albuginea are external to the seminiferous tubules.

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