Questions tagged [neuron]
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Myelination and time constant
In textbooks, it says that myelination doesn't really affect the time constant as tau=RC where R is the membrane resistance and C is the membrane capacitance. Myelin increases membrane resistance ...
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What are the advantages of bidirectional signalling in electrical synapses?
Electrical synapses are known for being very fast at communicating with other neurons. (1)
What I often see in articles about electrical synapses is that they are bidirectional.(1) This is seen as a ...
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What is the difference between axon and dendron?
I have seen the following answers on the internet.
1. Dendron transmits signal towards cell body and axon transmits signal away from it
2. Axon is often myelinated and longer
3. Axon terminal end has ...
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1answer
50 views
What causes sodium channels to open?
What triggers the opening of sodium channels in a neuronal membrane? Is it acetylcholine that activates sodium channels in the postsynaptic membrane?
Are sodium channels like receptors that have to ...
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1answer
82 views
Understanding presynaptic and postsynaptic inhibition
One way to classify neural inhibition is based on the inhibition being "presynaptic" or "postsynaptic".
As far as I understand, the two different types of inhibition refer to the following:
...
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1answer
34 views
Relationship between membrane current and voltage in neurons
Depolarization of neurons leads currents of different magnitudes flow in or out of the cell, and the Sodium and Potassium currents can be separately plotted (Purves):
Caption: Relationship between ...
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0answers
31 views
How long does it take the neurotransmitters to diffuse accross the synaptic cleft?
Neurotransmitters get from the pre-synaptic neuron to the receptors on the post-synaptic neuron by diffusion across the gap between these two (the synaptic cleft). My question is, how much time does ...
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8 views
How much is the motion speed of calcium ions in ion channels and neurons?
As far as I know, calcium ions moving in a Brownian manner are responsible for the performance of neurons and neuro-transmitters. My question is, how much kinetic energy these calcium ions have and ...
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1answer
49 views
When do the first neurons appear in humans?
According to this
Neural Plate
The neural plate appears in day 18 in humans (very specific).
and according to this
Neural Plate (wiki)
The progenitor cells that make up the precursors to neural ...
