What Is the Functional Significance of Large Areas of Cardiac

question 172

Multiple Choice

What is the functional significance of large areas of cardiac muscle being electrically coupled to form a single functional syncytium?

• A) Because they form a syncytium, cardiac muscles can contract on their own.
• B) Because they form a syncytium, muscle cells can pass an action potential along a large area of the heart wall, stimulating contraction in each muscle fiber of the syncytium.
• C) Because they form a syncytium, muscle cells cannot summate contraction to produce tetanus and thus not fatigue.
• D) Because they form a syncytium, cardiac muscle cells can pass an action potential by way of internodal bundles contracting both atrial chambers.

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Definitions:

Aggregate Supply

The complete amount of products and services that businesses within a country's economy intend to sell over a certain period.

Long Run Aggregate Supply

Long run aggregate supply represents the total output of goods and services that an economy can produce when both labor and capital are fully employed, at their most efficient levels.

Expected Price Level

The forecasted average price across all goods and services in an economy, reflecting the expected general price environment.

Long-Run Aggregate-Supply

The total quantity of goods and services that producers in an economy are willing and able to supply at a full employment level, without any changes in the price level over the long term.