Overview of neuron structure and function - Khan Academy
It is in the CNS that all of the analysis of information takes place. The peripheral nervous system (PNS), which consists of the neurons and parts of neurons found outside of the CNS, includes …
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Reflex action (& reflex arc) (video) | Khan Academy
Neurons can be short, less than a millimetre in length or very long like more than 1 meter. The longest neuron in the human body is the sciatic nerve (runs from the base of the spinal cord to …
What is polio? (article) - Khan Academy
Your nervous system contains millions of nerve cells, or neurons of which there are three types, sensory neurons, interneurons, and motor neurons. The sensory neurons are the ones that …
The nervous and endocrine systems (practice) | Khan Academy
Test your knowledge of the nervous and endocrine systems!
Nervous system physiology and disease - Khan Academy
There are about 85 billion neurons in your brain, and they’re sending electrical signals in your body right now! They tell your eyes to move across this page, interpret the words that you …
Anatomy of a neuron (video) | 2nd quarter | Khan Academy
This could be some type of sensory neuron. This could be on a taste bud someplace, so a salt molecule somehow can trigger it or a sugar molecule-- or this might be some type of sensor. It …
Neuron resting potential description (video) | Khan Academy
Explore the neuron resting membrane potential, a stable charge separation across the cell membrane. Discover the roles of anions and cations, and how their concentration differences …
Anatomy of a neuron (video) | The cell | Khan Academy
This could be some type of sensory neuron. This could be on a taste bud someplace, so a salt molecule somehow can trigger it or a sugar molecule-- or this might be some type of sensor. It …
Neuron action potential mechanism (video) | Khan Academy
The reason for this part of the action potential, which is called the falling phase, is because potassium starts to exit the neuron and it does so through a couple of types of channels. The …