Why Are Bacteria Abundant in the Large Intestines but Not

question 42

Multiple Choice

Why are bacteria abundant in the large intestines but not in the stomach?

• A) Food enters the stomach first and does not spend much time there.
• B) The stomach wall contains so much lymphoid tissue that it destroys all bacteria there.
• C) The intestine is much warmer and moister, encouraging bacterial growth.
• D) Secretions of parietal cells kill bacteria in the stomach.

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Definitions:

Stalactites

Icicle-shaped formations that hang from the ceiling of a cave, formed by the deposition of minerals from water dripping down.

Calcium Carbonate

A chemical compound, CaCO3, found in rocks such as limestone, chalk, and marble, and is the main component of pearls and the shells of marine organisms.

Sedimentary Rock

Rock formed by the accumulation and compaction of sediment, which can include minerals, organic matter, or the remains of organisms.

Dissolution

The process by which a solid, liquid, or gas forms a solution in a solvent, often related to the disintegration of minerals in water.