Join the Amoeba Sisters as they introduce the cardiac conduction system! This video mentions conductive cardiac cells (focusing on pacemaker cells) in the SA and AV nodes and discusses general steps of spontaneous depolarization. It also...

Join the Amoeba Sisters as they explore the action potential. This video discusses resting membrane potential before going into the phases of the action potential including vocabulary such as depolarization, repolarization, and...

In this video Paul Andersen explains how the electrochemical gradient is a combination of the chemical and electrical gradient of ions. As ions move across a membrane the potential change creates a hidden force that isn't always apparent.

Today we're talking the heart and heart throbs -- both literal and those of the televised variety. Hank explains how your heart's pacemaker cells use leaky membranes to generate their own action potentials, and how the resulting...

In this video Paul Andersen details the action potential in neurons. The resting potential of a neuron (-70mV) is maintained through differences in concentration and permeability of Na, K, and Cl ions. A graded potential is created as...

What do you and a sack of batteries have in common? Today, Hank explains.


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o Create Action Po
tential 4:51
Re
sting State...

This brief video tutorial briefly discusses resting membrane potential: 0:00​​. Introduction 0:53. What is a resting membrane potential? 1:33. How is a RMP measured? 4:12. How do we get a RMP at cell membranes? 9:04. How is the RMP...

This brief video tutorial briefly discusses voltage-gated sodium channels: 0:00​​. Introduction 0:14. Structure (activation gate and inactivation gate) 1:09. Three conformational states: - 1:24. 1. Closed - 2:30. 2. Open - 3:54. 3....

Let's dive into the cardiac action potential and how it results in the contraction of the heart. We'll talk about the signal that starts at the SA node and spreads throughout the heart. We'll also get into the phases of depolarization,...

In this video, I talk about the pacemaker potential of the heart. We're going to dig into the SA and AV Nodes, how they work, and what happens when things go wrong.<br/>

In this video, we discuss how the electrical conduction system generates a pacemaker potential by viewing the action potential diagram.

In this video, we will explore the physiological events in the cardiomyocyte that occur during the cardiac action potential. What occurs during each phase of the action potential?<br/>

Action Potential Physiology (Part 2)

Action Potential Physiology (FULL VIDEO)

In this video, we take a look at the graph representing the cardiomyocyte action potential and what each region of the graph represents.<br/>

We have probably heard that neurons are the cells that transmit information around the body. But how does this work? Is it actual electricity? Like from the wall socket? What is a synapse? What happens there, in between one neuron and...

We've learned about epithelial tissue, connective tissue, and muscle tissue, so now it's time to learn about the fourth and final type, nervous tissue! That means all the neurons that send signals around your body. These make up the...

In this episode I talk about the isoelectric point of proteins and why that causes the proteins inside the neuron to have a negative charge.

In this episode, I talk about the visual processing that happens in the retina, starting with the rods and cones, going to the bipolar cells and then the ganglion cells. Watch to learn how this process works.

In this episode, I go into detail about how On Center, Off surround Ganglion cells respond to light that stimulates rods and cones in the center and the surround of the ganglion cell's receptive fields.

When can an axon be restimulated to produce an action potential? After the Absolute Refractory Period has finished. It's possible to cause another action potential during the relative refractory period, but it takes a stronger stimulus....

In this video I talk about the two types of receptors - the ionotropic and metabotropic receptors and show how the result in different types of responses. Enjoy!

In episode 24, I respond to Nicodube23's question on How the Myelin Sheaths speed up the Action Potential through the process of Saltatory Conduction. Watch, learn and Enjoy!

After Depolarization and Repolarization comes Hyperpolarization, where the membrane potential falls beneath the Resting Membrane Potential. Watch the video to learn more!