An Artificial Pacemaker Can Be Implanted in Patients Whose Natural

question 39

Multiple Choice

An artificial pacemaker can be implanted in patients whose natural pacemaker is malfunctioning,causing an excessively slow or irregular heartbeat.In order for the artificial pacemaker to ensure proper cardiac rhythm,the electrical leads should be implanted

• A) in the middle of the left ventricle.
• B) in the brain.
• C) in the middle of the aorta.
• D) in the wall of the right atrium.
• E) at the atrioventricular node.

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Definitions:

Limestone

A sedimentary rock composed predominantly of calcium carbonate, principally in the form of calcite, and which may include chert, dolomite, and fine-grained clastic sediment.

Coral Reef

A marine ecosystem characterized by bio-constructed calcium carbonate structures built by coral organisms, often hosting diverse marine life.

Environments

Surroundings or conditions in which a person, animal, or plant lives or operates.

Rounded Cobbles

Rocks that have been rounded and smoothed over time by the continuous action of water, commonly found in riverbeds and beaches.