Which Statement Concerning Pacemaker Activity Is Correct

question 297

Multiple Choice

Which statement concerning pacemaker activity is correct?

• A) refers to spontaneous depolarizations of the membrane resulting from shifts in passive ionic fluxes accompanying automatic changes in channel permeability.
• B) refers to spontaneous depolarizations of the membrane due to cyclical changes in Na⁺- K⁺ pump activity.
• C) It is characteristic of single-unit smooth muscle but not found in any other muscle type.
• D) It is characteristic of multiunit muscle but not found in any other muscle type

---

Definitions:

Dollar Sales

Total revenue generated from the sale of goods and services, measured in dollars.

Unit Sales

The quantity of products sold, not considering the sales price or revenue.

Margin Of Safety

Margin of safety represents the difference between actual sales and the break-even point, indicating the buffer a company has before it incurs a loss.

Percentage Of Sales

A method or analysis tool that expresses components of a financial statement as a percentage of total sales.