Catalyst University
Muscle Physiology 3: Sodium-Potassium Pump
Muscle Physiology 3: Sodium-Potassium Pump
The Noted Anatomist
Adrenergic receptors
This video tutorial discusses Adrenergic receptors: 0:00. Intro 0:16. What are adrenergic receptors? 0:26. There are 2 types of adrenergic receptors 0:42. G-Protein coupled receptors that act through 2nd messengers 2:01. Alpha adrenergic...
Curated Video
015 Saltatory Conduction
In this video, I look at Saltatory conduction and explore how it is responsible for moving the action potential quickly along the axon and down to the axon terminals. See how the Myelin Sheaths influence the speed of propagation.
Catalyst University
Overview of the Posterior Pituitary [Neurohypophysis]
In this video, we explore the following: [1] the basic mechanism for hormone synthesis and release by the Posterior Pituitary [Neurohypophysis] [2] contrast this to the function of the anterior pituitary [3] basic functions of oxytocin...
Curated Video
Muscle Contraction Made EASY: What REALLY Happens During Exercise
How do muscles actually contract? There's a lot involved in the process. And in this video, we talk about muscle contraction at the molecular level. We'll discuss sarcomeres, actin, myosin, the muscle action potential and the roles of...
Curated Video
012 The Absolute and Relative Refractory Periods
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....
Curated Video
024 @Nicodube23 How Myelin Sheaths speed up the Action Potential
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!
Curated Video
011 Hyperpolarization - the end of the action potential
After Depolarization and Repolarization comes Hyperpolarization, where the membrane potential falls beneath the Resting Membrane Potential. Watch the video to learn more!
Curated Video
013 A Review of the Action Potential
Depolarization, repolarization, hyperpolarization - It's all here. Watch this for a review of the action potential.
Curated Video
014 The Journey Down the Axon
How does the signal that starts at the axon hillock travel down the axon, and why does it only go in one direction?
Curated Video
016 The Release of Neurotransmitter
When the action potential reaches the axon terminal, this triggers a series of events that result in the release of neurotransmitter to the synaptic cleft. Neurotransmitters bind to the receptors on the postsynaptic membrane causing a...
Curated Video
019 What is Summation (2 Types)
In this video, I discuss the topic of summation. It covers both temporal and spatial summation, dealing with how it can result in the addition of PSPs to result in an action potential. Enjoy!
Curated Video
020 Facilitation
In this episode, I talk about the concept of facilitation and explain how it results in a stronger signal in the postsynaptic cell.
Curated Video
022 Re: Akbar - Inactivation of V-gated Sodium Channels
In this video, I respond to a question that was posted by Akbar on my blog. He asks about the difference between the inactive and closed states of v-gated sodium channels. I illustrate the difference using a box. Enjoy!
Curated Video
Action Potentials and Contraction in Cardiac Muscle Cells
In this episode, I show how the Action potential is generated in cardiac muscle cells and how this results in Contraction of the Heart. When the action potential happens, calcium ions are released from the Sarcoplasmic reticulum, causing...
Curated Video
The Action Potential in All Its Glory - A Review/Summary
What does it take for an action potential to take place? What are depolarization, repolarization, and hyperpolarization? How are voltage-gated ion channels involved? In this video, you will get answers to all these questions.
Curated Video
007 What is an action Potential
In this episode, I answer a question that is fundamental to our understanding of the nervous system. That question is - What is an action potential/nerve impulse. Action potentials are the signals that are sent throughout the nervous...
Curated Video
008 The All-or-None Action Potential
In this episode, I talk about the all-or-none nature of the action potential. Action potentials/nerve impulses either happen or they don't. If the stimulus is strong enough to cause the membrane potential to reach threshold, this will...
Curated Video
009 Depolarization: Phase 1 of the Action Potential
In this video, I talk about the first phase of the action potential - Depolarization. In order for the action potential to take place, the stimulus needs to be strong enough to bring the membrane potential at the axon Hillock to...
Curated Video
010 Repolarization: Phase 2 of the Action Potential
The second phase of the Action Potential is Repolarization. Voltage-gated Potassium channels open and Potassium leaves the cell making the membrane potential more negative.
Catalyst University
The Cardiac Muscle Action Potential EXPLAINED
In this video, we explore the biochemical events that take place during the action potential of an individual cardiomyocyte.
Neuro Transmissions
Welcome to Neuro Transmissions
Hey there! Thanks for stumbling on our introduction video. Neuro Transmissions is a channel on a mission to bring neuroscience to everyone. It's not rocket surgery, it's brain science!
Catalyst University
Cardiac Muscle Action Potential Diagram EXPLAINED
In this video, we discuss the events of the cardiac muscle action potential by viewing the action potential graph/diagram.