- Anatomy of a neuron (video) | Human biology | Khan Academy
Neurons (or nerve cells) are specialized cells that transmit and receive electrical signals in the body Neurons are composed of three main parts: dendrites, a cell body, and an axon
- The synapse (article) | Human biology | Khan Academy
In this article, we'll take a closer look at the synapse and the mechanisms neurons use to send signals across it To get the most out of this article, you may want to learn about neuron structure and action potentials first
- Depolarization, hyperpolarization neuron action potentials (article . . .
In neurons, the cell enters a state of hyperpolarization immediately following the generation of an action potential While hyperpolarized, the neuron is in a refractory period that lasts roughly 2 milliseconds, during which the neuron is unable to generate subsequent action potentials
- Signal propagation: The movement of signals between neurons
Your brain is a hotbed of electrochemical activity About 100 billion neurons are each firing off 5-50 messages (action potentials) per second This activity allows you to process your environment, move your muscles, and even keep your balance!
- Membrane potential (resting membrane potential) (article) - Khan Academy
In neurons, the resting membrane potential depends mainly on movement of K + through potassium leak channels Let's see how this works
- Synapse structure (video) | Khan Academy
This video discusses synapses, where neurons communicate with target cells It differentiates between two types of synapses: chemical and electrical It also explains the role of the synaptic cleft, presynaptic and postsynaptic membranes, and neurotransmitters in this process
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