The Oxidation of Iron to Rust Is a Problem Structural

question 70

Multiple Choice

The oxidation of iron to rust is a problem structural engineers need to be concerned about, but the oxidation of aluminum to aluminum oxide is not. Why?

• A)Since aluminum is so light and inexpensive, it is easily replaced when corroded.
• B)Aluminum oxide is insoluble in water and thus forms a protective coating that prevents continued oxidation of the aluminum.
• C)Aluminum oxide is even stronger than aluminum.
• D)The oxidation of aluminum is a very slow reaction, taking hundreds of years before any structural changes are noticed.

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Definitions:

Lactate Production

Lactate production occurs during anaerobic respiration in muscles, where glucose is converted to lactate in the absence of sufficient oxygen, leading to muscle fatigue.

Venous Tone

The degree of constriction experienced by the veins, influencing the volume of blood held within venous reservoirs and blood pressure.

Medulla Oblongata

The lower portion of the brainstem that regulates vital functions, such as heart rate and breathing.

Vasomotor Center

Area within the medulla oblongata that regulates the diameter of blood vessels by way of the sympathetic nervous system.