If the Sinoatrial Node Fails in the Heart

question 6

Multiple Choice

If the sinoatrial node fails in the heart,

• A) the heart ceases to beat.
• B) the ventricles will beat at a higher rate.
• C) an artificial pacemaker can correct the problem.
• D) the heartbeat is unaffected.
• E) the atria will not contract.

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Definitions:

True Variable Cost

Costs that vary directly and proportionally with the level of production or activity within a business.

Fixed Cost

Expenses that do not change in total despite fluctuations in production or sales volume.

Mixed Cost

A cost consisting of both fixed and variable components and which is thus partially affected by changes in the level of activity.

Charitable Contribution

Monetary or in-kind donations given to charitable organizations, often eligible for tax deductions.