Cardiac M Uscle Cannot Increase Its Strength of Contraction by Repetitive

question 11

Multiple Choice

Cardiac m uscle cannot increase its strength of contraction by repetitive stimulation (wave summation) because

• A) The action potential lasts hundreds of milliseconds, as long as the cardiac cycle
• B) The SR empties its Ca²⁺ with every heart beat
• C) The SA node fires too frequently for the cardiomyocytes to follow
• D) The absolute refractory period is longer than the action potential
• E) The bundle of His has no reserve capacity

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Definitions:

Real Option

The right, but not the obligation, to undertake certain business initiatives, such as deferring, abandoning, expanding, staging, or contracting a project at a future date.

Capital Budgeting

The process of analyzing and ranking potential expenditures or investments that are significant in amount, to determine which projects will provide the best return.

Assigned Value

A valuation determined for an asset or liability, often used in accounting to assign costs or values.

Risk Adjusted NPV

Net Present Value method adjusted for the risk associated with the uncertain cash flows, taking into account the variability of returns and the cost of capital.