While the SA node is considered the pacemaker of the heart, the AV node is also capable of generating spontaneous action potentials, allowing it to serve as a “backup system” in case of …

Section 1: Create a flow chart image showing the map of the electrical activity of the heart (begin with the SA node) Include each step the electrical activity travels as it goes through the heart.

An arrhythmia originating in pacemakers that shift back and forth between the SA node and an ectopic pacemaker in the atria or AV junction is called a (n): A.

Solution for QUESTION 3 What would happen if the AV node failed to delay transmission of signals from the SA node? The atria and ventricles would contract at…

Which of the following statements is true about the SA (sinoatrial) node? a. The action potential created by the pacemaker cells of the SA node directly stimulates the contractile cells of both …

Draw an action potential recorded in a sinoatrial (SA) node cell for aperson at rest (HR = 75 bpm).2. Label the units and values for both axes.3. Label changes in ion permeability:- Where …

The rate of spontaneous depolarization of nodal cells is the fastest in the SA node. c. Pacemaker cells in the SA node form a pathway between the SA and AV nodes.

You are testing a compound as cardioactive drug. You know the compound is an agonist of acetylcholine (ACh) at the relevant ACh receptor (AChR) on sinoatrial (SA) node cells. Briefly …

Transcribed Image Text: Scenario 2-One very unhealthy-looking human goes into atrial fibrillation while working out in the Vegan gym. This is when the SA node is not generating coordinated …

SA node is the main pacemaker of the heart. Why is the normal heart rate lower than the intrinsic firing rate of the SA node? A. sympathetic inputs from the hypothalamus are slowing it down B. …