Lucas Is Studying the Relationship Between Age and Commuting Habits

question 17

Short Answer

Lucas is studying the relationship between age and commuting habits. In this relationship, age is the variable.

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Definitions:

Coronary Arteries

Arteries that supply blood to the heart muscle itself, crucial for providing the necessary oxygen and nutrients for cardiac function.

Myocardium

The muscular tissue of the heart, responsible for the contracting action that pumps blood through the body.

Pacemaker

A device that delivers electrical impulses to the heart to regulate the heartbeat, used in cases of arrhythmia. Another reference is to specialized heart cells that naturally set the rhythm of the heart.

SA Node

The sinoatrial node, known as the heart's natural pacemaker, which initiates the electrical impulses that dictate heart rhythm.