Select the Correct Statement About the Function of Myocardial Cells

question 71

Multiple Choice

Select the correct statement about the function of myocardial cells.

• A) The refractory period in skeletal muscle is much longer than that in cardiac muscle.
• B) Cardiac muscle cells are innervated by sympathetic, parasympathetic, and somatic nerve fibers so that the nervous system can increase heart rate.
• 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:

Depreciation

The process of allocating the cost of a tangible or intangible asset over its useful life, reflecting the decrease in value of the asset over time due to use, wear and tear, or obsolescence.

Stock Of Capital Goods

The total quantity of physical assets such as machinery, buildings, and equipment that are used to produce goods and services.

Gross Investment

The total amount spent on purchases of new capital assets plus replacement of depreciated assets.

Depreciation

The gradual decrease in the economic value of the capital stock of a firm, nation, or other entity, either through physical wear and tear or through obsolescence.