Webb3 jan. 2024 · Axon initial segments (AISs) generate action potentials and regulate the polarized distribution of proteins, lipids, and organelles in neurons. While the … WebbThe axon arises from the soma at a region called the axon hillock, or initial segment. This is the region where the plasma membrane generates nerve impulses; the axon conducts these impulses away from the soma or dendrites toward other neurons. Large axons acquire an insulating myelin sheath and are known as myelinated, or medullated, fibres.

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http://amigo.geneontology.org/amigo/term/GO:0043194 Webb12 okt. 2024 · The axon initial segment (AIS) is a specialized structure in neurons that resides in between axonal and somatodendritic domains. The localization of the AIS in neurons is ideal for its two major functions: it serves as the site of action potential firing and helps to maintain neuron polarity. brother phone fax machine

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WebbFirst segment of axon that connects distal axon segments to the neuronal CELL BODY at the axon hillock region. The axon initial segment is not protected by the MYELIN SHEATH and has properties critical for axonal growth. The axon initial segment and the axon hillock form an axonal trigger zone. Svenska synonymer Engelska synonymer Webb22 mars 2024 · In neocortical layer-5 pyramidal neurons, the action potential (AP) is generated in the axon initial segment (AIS) when the membrane potential (V m) … Webb轴突起始节（axon initial segment，AIS）位于神经元的轴突近胞体端，在神经元上起着非常重要的作用，比如：爆发动作电位，维持细胞极性，调节细胞兴奋性以适应来自神经网 … brother phone support number