In-Text Figure Based Questions

question 105

Multiple Choice

In-Text Figure Based Questions
-Each molecule of heme contains a single ion of what element? (Figure 19-3)

• A) sodium
• B) potassium
• C) magnesium
• D) iron
• E) calcium

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Definitions:

AV Node

The atrioventricular node, a critical component of the heart's electrical system responsible for regulating the timing of heart beats.

Bundle of His

A collection of heart muscle cells specialized for electrical conduction that transmits the electrical impulses from the AV node to the point of the apex.

ECG Tracing

The recorded activity of the heart obtained through an electrocardiogram, showing the heart's electrical movements.

Lead Wires

Conductive wires used in medical settings to connect electrodes or sensors to diagnostic equipment or monitoring devices.