Sagittarius A*,the Radio Source Located at the Center of Our

question 37

Multiple Choice

Sagittarius A*,the radio source located at the center of our galaxy,is believed to be a:

• A) massive star cluster.
• B) supernova remnant.
• C) quasar.
• D) supermassive black hole.

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Definitions:

Mitral Valve

A valve in the heart located between the left atrium and left ventricle that allows blood to flow in one direction from the atrium to the ventricle.

Aorta

The largest artery in the body, which carries oxygenated blood from the heart to the rest of the body.

Tricuspid Valve

A valve in the heart that lies between the right atrium and the right ventricle, preventing backflow of blood from the ventricle to the atrium.

Trabeculae Carneae

Muscular ridges on the internal surface of the heart's ventricles.