Which of the Following Is the Ultimate Action That Causes $\beta$

question 11

Multiple Choice

Which of the following is the ultimate action that causes release of insulin from pancreatic $\beta$ -cells?

• A)opening of ATP-gated K⁺ channels
• B)closing of ATP-gated K⁺ channels
• C)catabolism of glucose resulting in increased ATP
• D)opening of voltage gated Ca²⁺ channels leading to decreased cytosolic Ca²⁺
• E)opening of voltage gated Ca²⁺ channels leading to increased cytosolic Ca²⁺

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Definitions:

Operating Leverage

A measure of how sensitive a company’s operating income is to a change in its sales volume, emphasizing the cost structure between fixed and variable costs.

EBIT

A gauge of company profits, Earnings Before Interest and Taxes, leaves out the charges for interest and taxes to show raw earnings.

Sales

The transactions involved in selling goods or services in the normal course of business, generating revenue for the company.

DOL

Degree of Operating Leverage; a measure of a company's fixed costs as a percentage of its total costs, indicating how earnings before interest and taxes (EBIT) change in response to a change in sales volume.