Figure 41-3 Use the Figure to Answer the Corresponding Question(s)

question 19

Multiple Choice

Figure 41-3
Use the figure to answer the corresponding question(s) .
-In Figure 41-3, point A is:

• A) the resting state.
• B) indicative of repolarization.
• C) the threshold level.
• D) the equilibrium potential.
• E) indicative of hyperpolarization.

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Definitions:

Diffusion

Movement of molecules from an area of high concentration to one of lower concentration.

Ventilation

Respiratory process by which gases are moved into and out of the lungs.

Electrocardiogram (ECG)

Graphic record of the electrical activity of the myocardium.

Conduction System

The network of nodes and special pathways in the heart that control and coordinate the timing and sequence of the cardiac cycle (heartbeat).