Multiple Choice
In the electrical conduction system of the heart, which structure is considered the pacemaker of the heart?
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18. The Heart
Electrical Conduction System of the Heart
Multiple Choice
Which feature of cardiac tissue allows for the rapid spread of action potentials through the heart?
A
Nodes.
B
Myelin sheaths.
C
Pacemaker Cells.
D
Gap junctions.
Verified step by step guidance1
Understand that cardiac tissue is composed of specialized cells that facilitate the contraction and relaxation of the heart.
Recognize that action potentials are electrical signals that trigger these contractions, and their rapid spread is crucial for synchronized heart function.
Identify the role of gap junctions, which are specialized intercellular connections that allow ions and small molecules to pass directly between cells.
Learn that gap junctions enable the rapid transmission of action potentials by allowing electrical signals to quickly pass from one cardiac cell to another.
Conclude that the presence of gap junctions in cardiac tissue is essential for the coordinated contraction of the heart, ensuring efficient pumping of blood.
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