The myelin sheath is an insulating layer around an axon, formed by glial cells, which speeds up nerve impulse transmission by allowing 'jumping' between nodes of Ranvier.
Around the axon of a neuron, an insulating coat of cell membranes from Schwann cells or oligodendrocytes. It is interrupted by nodes of Ranvier, where action potentials are generated.
| Front | myelin sheath |
|---|---|
| Back | Around the axon of a neuron, an insulating coat of cell membranes from Schwann cells or oligodendrocytes. It is interrupted by nodes of Ranvier, where action potentials are generated. |
Tags: ch.48
Learn with these flashcards. Click next, previous, or up to navigate to more flashcards for this subject.
Next card: Neuron nerve cell fundamental unit nervous system structure
Previous card: Motor neuron nerve cell transmits signals brain spinal
Up to card list: Biology 560/570/580