What is an axon and its function?
Axon, also called nerve fibre, portion of a nerve cell (neuron) that carries nerve impulses away from the cell body. A neuron typically has one axon that connects it with other neurons or with muscle or gland cells. Some axons may be quite long, reaching, for example, from the spinal cord down to a toe.
What is an axon in psychology?
n. the long, thin, hollow, cylindrical extension of a neuron that normally carries a nerve impulse away from the cell body. An axon often branches extensively and may be surrounded by a protective myelin sheath.
What is the primary function of an axon?
The axon carries messages in the form of action potentials from the cell body to its endfeet, which synapse upon other neurons or effector organs. Cells with long axons are called principal neurons. These cells establish the pattern of connectivity within the nervous system.
Why is the axon important?
From the broadest perspective, the function of axons is to carry electrical impulses that are the means of communication within the brain and between the brain and the rest of the body.
How does an axon work?
Each neuron in your brain has one long cable that snakes away from the main part of the cell. This cable, several times thinner than a human hair, is called an axon, and it is where electrical impulses from the neuron travel away to be received by other neurons.
How long is the longest axon in the human body?
The longest neuron in the human body has a single threadlike projection (the axon), a few micrometers in diameter, that reaches from the base of the spine to the foot, a distance of up to one meter.” For axon length of over a meter see Cavanagh (1984, PMID 6144984 p.
What is the main function of the axon which is shown below?
An axon, or nerve fiber, is a long slender projection of a nerve cell, or neuron, that conducts electrical impulses away from the neuron’s cell body or soma. Axons are in effect the primary transmission lines of the nervous system, and as bundles they help make up nerves.
How do axons transmit information?
Axons connect with other cells in the body including other neurons, muscle cells, and organs. These connections occur at junctions known as synapses. The synapses allow electrical and chemical messages to be transmitted from the neuron to the other cells in the body.
Why is the axon long?
Long, short, straight and curvy axons all had a refraction ratio approaching one. This means that when axons grow in a long and curved shape, it’s designed that way by the neuron to slow down the action potential of signals in order to optimize the refraction ratio.
How does having a long axon help neurons with their function?
A bundle of neurons is called a nerve. The features of neurons help them to carry out their function efficiently: they have a long fibre (axon ) so they can carry messages up and down the body over long distances. in a stimulated neuron, an electrical nerve impulse passes along the axon.
Where is the axon located in the body?
Structure of a neuron. At one end of the cell body (and indeed, around most of its periphery) are many small, branching protrusions called dendrites. Extending from the other end of the cell body at a location called the axon hillock is the axon, a long, thin, tube-like protrusion.
What does an axon look like?
Longer axons are usually covered with a myelin sheath, a series of fatty cells which have wrapped around an axon many times. These make the axon look like a necklace of sausage-shaped beads. They serve a similar function as the insulation around electrical wire.
Do axons move?
The long length of axons makes them critically dependent on intracellular transport for their growth and survival. This movement is called axonal transport. Cargoes originating from the cell body move out towards the axon tip and cargoes originating in the axon or at the axon tip move back towards the cell body.