Of the Steps in Excitation-Contraction Below, Which Step Occurs Before

question 214

Multiple Choice

Of the steps in excitation-contraction below, which step occurs before the others?

• A)Exposed actin sites bind with myosin cross bridges.
• B)Sodium channels open in the fiber's membrane.
• C)Calcium is released from the sarcoplasmic reticulum.
• D)Troponin binds calcium.
• E)Attachment of ATP allows for cross bridge detachment.

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Definitions:

ROE

Return On Equity represents a financial performance metric that is obtained by dividing a company's net income by its shareholders' equity, demonstrating the company's effectiveness in using investor funds to grow earnings.

EPS

Earnings Per Share, a key indicator of a company's profitability, calculated by dividing the company's net income by its total number of outstanding shares.

DFL

Degree of Financial Leverage, a ratio measuring the sensitivity of a company's earnings per share to fluctuations in its operating income, due to changes in its capital structure.

Optimal Capital Structure

The most favorable blend of debt and equity financing that minimizes a company's cost of capital while maximizing its market value.