What are Nerve Fibers?
Nerve fibers (Axon) are a long extension of the cellular body, of various sizes. It is covered by a protected sheath known as neurolemma. The Nodes of Ranvier are the lengthwise gap between the myelin sheaths, and the side branches of axons are known as collaterals. The swollen end is composed of neurotransmitters that conduct nerve impulse transmission. The nerve and nerve fibres are the parts of the nervous system.
The nervous system is formed by the network of the brain and nerves. Nerves carry signals from the brain to different parts of the body. These are responsible for various sensations and impulses. The nervous system controls involuntary activities e.g. breathing and digesting food.
Properties and Classification of Nerve Fibres
Nerve fiber, also known as an axon, is a long, thin projection found on nerve cells (neurons) responsible for nerve impulses’ conduction through the nerve cell body. Nerve fibers show properties including conductivity, velocity, refractive period, summation, and accommodation. They can sense stimuli and carry electrical impulses. Nerve fibers are classified based on conduction velocity, size, and presence or absence of myelin sheath into groups A, B, and C.
In this article, we will study in detail Nerve Fibres, their structural properties, the Conduction of nerve impulses, the Numerical classification of nerve fibers, and nerve fibers in invertebrates.
Table of Content
- What are Nerve Fibers?
- Structural Properties of Nerve Fibers
- Conduction of Nerve Impulse
- Classification of Nerve Fibres
- Numerical Classification of Nerve Fibers
- Nerve fibres in Invertebrates
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