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- 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
- 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
- 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!
- Neuronal synapses questions (practice) | Khan Academy
Neuronal synapses questions Mini MCAT passage: Neurotransmitter removal from the synapse Mini MCAT passage: Manipulating synaptic transmission between neurons Signal propagation: The movement of signals between neurons Synapse structure Neurotransmitter release Types of neurotransmitters
- 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:
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