What Does the Time a Protostar Takes to Contract from a Cool

question 83

Multiple Choice

What does the time a protostar takes to contract from a cool interstellar gas cloud to a main-sequence star mainly depend on?

• A) luminosity
• B) mass
• C) magnetic field
• D) location on the main sequence

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Definitions:

Liver

A large, vital organ in vertebrates responsible for detoxification, producing bile, metabolizing nutrients, and performing other biochemical tasks.

Glucose

A simple sugar that is an important energy source in living organisms, also a critical component of carbohydrate metabolism.

Cori Cycle

Named for Czech-U.S. biochemist and Nobel laureate Carl F. Cori (1896–1984). Lactic acid, produced by skeletal muscle, is carried in the blood to the liver, where it is aerobically converted into glucose. The glucose may return through the blood to skeletal muscle or may be stored as glycogen in the liver.

Protein Metabolism

The process by which proteins are synthesized, broken down, and converted into other proteins or forms of energy within the body.