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Neuro Block I
UTSW Neuro Block I
Question | Answer |
---|---|
Why do neurons use electrical signaling for transmission? | speed of transmission over distance (also: info preservation, metabolic efficiency, dynamic modulation) |
How long does it take a small particle to diffuse across a plasma membrane (10 nm)? | 0.025 microsec |
How long does it take a small particle to diffuse across a synaptic cleft (100 nm)? | 2.5 microsec |
How long does it take a small particle to diffuse across a soma diameter of a small neuron (10 micrometer)? | 25 msec |
How long does it take a small particle to diffuse across a local cortical axon projection (1 mm)? | 250 sec |
How long does it take a small particle to diffuse across a spinal neuron axon to toe (1 m)? | 7.9 years |