Biology

Questions tagged [neuron]

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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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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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How much is neuronal firing rate in the cerebral cortex?

I'd like to know the maximum, minimum, and average rate at which the neurons in human cerebral cortex spike in wakefulness and while sleeping.
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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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What is the movement of K across neuronal membrane if extracellular KCl is artificially elevated to 15 mM?

We had used 15 mM KCl treatment to challenge primary mouse embryonic E17.5 forebrain neuronal cultures in a study and I wonder what the flow of ions is when extracellular KCl concentration is elevated ...
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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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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 ...