Overview of neuron function (video) | Khan Academy Neurons receive excitatory or inhibitory input from other cells or from physical stimuli like odorant molecules in the nose Input information usually comes in through the dendrites
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
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!
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
Neuron action potentials: The creation of a brain signal Neurons are similar to other cells in that they have a cell body with a nucleus and organelles However, they have a few extra features which allow them to be fantastic at transferring action potentials:
Neuroplasticity (video) | Khan Academy This process involves changes in synapses and neurons, leading to potentiation or depression of information flow It's most active during development, but continues throughout life, with research ongoing to understand its complexities Created by Matthew Barry Jensen