Please compare and contrast action potentials in cardiac autorhythmic cells and cardiac contractile cells, including drawings to illustrate your discussion. Would increased sympathetic nervous system activity affect either of these cells? If so, please describe how, including the cellular mechanism that produces the effect. What effect(s) would this have on overall cardiac function?
Added by Luc-A T.
Step 1
Action potentials in cardiac autorhythmic cells: - These cells are responsible for generating and conducting electrical impulses that initiate each heartbeat. - They have a unique property called automaticity, which means they can spontaneously depolarize and Show more…
Show all steps
Your feedback will help us improve your experience
Madhur L and 83 other Biology educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
Compare and contrast the following aspects of the action potential in neurons and cardiac pacemaker cells: • How do the resting membrane potentials differ? • What happens at threshold to allow for complete depolarization?
James K.
Action potentials (APs) in the sinoatrial (SA) node and ventricular cells of the heart are different. Draw two graphs (time vs. membrane potential) that display these two types of AP and indicate the major permeant ion (K+, Na+ or Ca2+) during each phase (4 labels on each AP). Comment on why the APs are different given the function of these cells in the heart.
Sri K.
Adi S.
Recommended Textbooks
Biology for AP Courses
Objective Biology for NEET
Introduction to General, Organic and Biochemistry
Transcript
Watch the video solution with this free unlock.
EMAIL
PASSWORD