Nerve Fibre (Noun)
Meaning
A threadlike extension of a nerve cell.
Classification
Nouns denoting body parts.
Examples
- Each bundle of axons in the PNS is called a nerve fibre and each bundle of axons in the CNS is called a nerve tract.
- A small electrical impulse is transmitted down the length of the nerve fibre through electrochemical impulses to convey a nerve impulse from one end of the fibre to the other.
- A nerve fibre usually transmits only one type of action potential all-or-none activity meaning if an impulse travels over it.
- Many animals particularly octopuses transmit neural messages slowly possibly making reaction to stimuli slow since action potentials require at least 100 milliseconds and usually more than 200 milliseconds to propagate down the nerve fibre.
- The fine adjustment of a neuron's activity is typically controlled by neuromodulators that bind to specific receptors on the nerve fibre membrane.