Pls help An action potential reaches a cardiac contractile cell, which fires, but then does not propagate the signal to to the rest of its neighboring cardiaccontractile cells. What would cause the action potential to fizzle out without being propagated to the neighboring contractile cells?ARemoval of the gap junctions in the intercalated discsBRemoval of the neuromuscular junctionRemoval of chloride ions from the pacemaker cellsRemoval of potassium ions from the pacemaker cellsENone of these answers are correctFRemoval of calcium ions from the pacemaker cells

Answered: An action potential reaches a cardiac…

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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Question

Pls help

An action potential reaches a cardiac contractile cell, which fires, but then does not propagate the signal to to the rest of its neighboring cardiac
contractile cells. What would cause the action potential to fizzle out without being propagated to the neighboring contractile cells?
A
Removal of the gap junctions in the intercalated discs
B
Removal of the neuromuscular junction
Removal of chloride ions from the pacemaker cells
Removal of potassium ions from the pacemaker cells
E
None of these answers are correct
F
Removal of calcium ions from the pacemaker cells

Expert Solution

Step 1

The heart muscle (also called the heart muscle or myocardium) is one of three types of spinal muscle tissue, the other two being skeletal muscle and smooth muscle. It is a voluntary, boring muscle that forms the major tissues of the heart wall.

The muscles of the heart muscle form the muscles around the heart. With muscle activity that causes the circulation of blood throughout the body, unlike skeletal muscle, movement is not involved in supporting health.