Provide an Appropriate Response

question 4

Essay

Provide an appropriate response.
-Combine into a single fraction and simplify:

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Definitions:

Pericardial Cavity

A fluid-filled space that surrounds the heart and provides protection and lubrication, allowing the heart to beat in a relatively frictionless environment.

Epicardium

A thin layer of tissue that forms the outermost part of the heart's wall.

Depolarization

The process in which the resting membrane potential of a cell becomes less negative, making the cell more likely to fire an action potential.

Pacemaker Cells

Specialized heart cells that generate and regulate the heart's rhythm.