Neurons are specialized cells that transmit electrical and chemical signals throughout your body. Each neuron has a specific structure designed for re
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Why is myelin important for neuron function?
Myelin insulates the axon, preventing ion leakage. This allows the action potential to regenerate only at nodes of Ranvier instead of continuously along the entire axon. This saltatory conduction is about 50 times faster than conduction on unmyelinated axons.
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What happens if the sodium-potassium pump stops working?
Sodium accumulates inside the cell and potassium accumulates outside. The resting membrane potential decreases and eventually disappears. Without this potential, neurons cannot generate action potentials and signals cannot be transmitted.
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How do painkillers work at the neural level?
Pain signals travel along neurons using specific neurotransmitters. Painkillers either block these neurotransmitters at synapses or close ion channels that would generate pain signals. This interrupts the pain message before it reaches the brain.
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