Asked by Milena Padilla on Jul 20, 2024
Verified
The action potentials are slowed at the AV node to allow the
A) ventricles to repolarize.
B) ventricles to completely empty of blood.
C) pacemaker to reset for the next beat.
D) atria to complete their contraction.
E) atria to begin their contraction.
AV Node
The Atrioventricular Node, a part of the cardiac conduction system that delays the transmission of electrical impulses from the atria to the ventricles.
Action Potentials
Quick changes in the electrical charge of a neuron's membrane, allowing the transmission of nerve impulses.
Ventricles Repolarize
The process by which the heart's ventricles return to their resting state after contraction, crucial for heart rhythm.
- Characterize the fundamental parts and operations of the cardiac conduction system.
- Understand the biological processes that govern the contraction of the heart and the sequence of events in the cardiac cycle.
Verified Answer
IM
Ingrid MonserratJul 25, 2024
Final Answer :
D
Explanation :
The action potentials are slowed at the AV node to allow the atria to complete their contraction, ensuring that the ventricles are fully filled with blood before they contract. This delay is crucial for efficient heart function, allowing for proper filling of the ventricles.
Learning Objectives
- Characterize the fundamental parts and operations of the cardiac conduction system.
- Understand the biological processes that govern the contraction of the heart and the sequence of events in the cardiac cycle.