The Following Are Various Components of the Conducting System of the Heart

question 69

Multiple Choice

The following are various components of the conducting system of the heart:
1) Purkinje cells
2) AV bundle
3) AV node
4) SA node
5) bundle branches
The sequence in which an action potential would move through this system is

• A) 1, 4, 3, 2, 5.
• B) 3, 2, 4, 5, 1.
• C) 3, 5, 4, 2, 1.
• D) 4, 3, 2, 5, 1.
• E) 4, 2, 3, 5, 1.

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Definitions:

Operating Leverage

A measure of how sensitive a company's operating income is to changes in revenue.

Marginal Tax Rate

The rate of tax applied to the next dollar of taxable income, indicating how much tax will be paid on an additional dollar earned.

Operating Cash Flow

A measure of the cash generated by a company's normal business operations.

DOL

Degree of Operating Leverage, a ratio that measures how a company's operating income changes with a change in sales, indicating the effects of fixed costs on profits.