Select the Correct Statement About the Function of Myocardial Cells

question 9

Multiple Choice

Select the correct statement about the function of myocardial cells.

• A)Each cardiac muscle cell is innervated by a sympathetic nerve ending so that the nervous system can increase heart rate.
• B)The refractory period in skeletal muscle is much longer than that in cardiac muscle.
• C)The entire heart contracts as a unit or it does not contract at all.
• D)The influx of potassium ions from extracellular sources is the initiating event in cardiac muscle contraction.

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Definitions:

Cumulative Preferred Stock

A type of preferred stock where dividends that have not been paid in the past must be paid out to preferred shareholders before common shareholders can receive any dividends.

Par Common Stock

The face value of common stock as designated in the corporate charter, which is the minimum amount that shares can be issued for.

Total Dividend

The sum of all dividends paid out to shareholders for a specific period, representing the share of profits distributed.

Reacquired Shares

Shares that were previously issued and have been bought back by the issuing company, reducing the amount of outstanding stock on the open market.