Axon
Definition
A unique, long, and thread-like extension of a neuron, which has the fundamental structural and physiological role of conducting the efferent nerve impulse (action potential) away from the cell body (soma) toward other nerve, muscle, or glandular cells. This cellular component is delimited by the axolemma, contains axoplasm, and is often protected by an insulating myelin sheath, facilitating an ultra-fast, precise, and delicate transmission of bioelectric signals within the nervous system.
Bilingual Equivalents
- Axon
- Nerve fiber
Grammatical & Source Details
| Inflection Type | Masculine noun, regular structural plural and dative case variations within medical literature. |
| Formation | Neologistic borrow from French ('axone'), structurally originating from the Greek noun 'axon' (axis, pivot). |
| Spelling / Pronunciation | [ˈak.son] |
| Source | Encyclopedia of Human Histology, Neurobiology and Cellular System Standards |
Contextual Usage Examples
RO: Semnalul electric călătorește de-a lungul axonului cu o viteză uimitoare datorită nodurilor Ranvier izolate structural.
EN: The electrical signal travels along the axon at an amazing speed due to the structurally isolated nodes of Ranvier.
RO: În bolile demielinizante, învelișul protector din jurul axonului este distrus, încetinind reflexele pacientului.
EN: In demyelinating diseases, the protective sheath around the axon is destroyed, slowing down the patient's reflexes.
RO: Cercetătorii au stimulat un axon izolat în laborator pentru a măsura variațiile exacte ale canalelor de sodiu.
EN: The researchers stimulated an isolated axon in the laboratory to measure the exact variations of the sodium channels.
Idioms & Phrases
Teacă de axon / Axon sheath
RO: Strat protector format din mielină sau celule Schwann care izolează electric fibra nervoasă.
EN: A protective layer formed by myelin or Schwann cells that electrically insulates the nerve fiber.
Terminal de axon / Axon terminal
RO: Ramificație finală a prelungirii neuronale unde se eliberează neurotransmițătorii în fanta sinaptică.
EN: The final branching of the neuronal extension where neurotransmitters are released into the synaptic cleft.
Deal de axon / Axon hillock
RO: Regiune structurală conică a corpului celular neuronal de unde pornește axonul și unde se generează potențialul de acțiune.
EN: A conical structural region of the neuronal cell body from which the axon originates and where the action potential is generated.
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