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 the atria and …

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.

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 are P K, P Na …

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.

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 SA node failure. If …

AV bundle Which of the following depolarizes next after the AV node? a. Atrial myocardium b. Ventricular myocardium c. Bundle branches d. AV bundle Solution Summary: The author explains …

Your grandfather was told that his SA node (pacemaker) has stopped functioning. Explain how his heart is still beating at a rate of 40 to 50 times per minute. Are the atria stimulated to contract? Explain.

Solution for Which of the following is NOT a population of pacemaker cells in the heart? a. papillary muscles b. sinoatrial (SA) node c. atrioventricular (AV)…

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.

Because of a reduced blood supply to the AV node, the delay in theconduction of action potentials from the SA node to the AV node isincreased slightly. All other areas of the conducting system of the …