Which of the Following Gases Is the Main Constituent of Volcanic

question 9

Multiple Choice

Which of the following gases is the main constituent of volcanic gas?

• A)carbon dioxide
• B)nitrogen
• C)sulfur dioxide
• D)water vapor

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Definitions:

Bundle of His

A collection of heart muscle cells specialized for electrical conduction that transmits the electrical impulses from the atrioventricular node to the point of the apex of the fascicular branches.

Intraatrial Pathways

Specialized conductive fibers in the atria of the heart that facilitate the passage of electrical impulses.

Stroke Volume

The amount of blood ejected from the left ventricle of the heart during each contraction.

Preload

Volume of blood in the ventricles at the end of diastole, immediately before ventricular contraction.