Table of Contents
Why do most nerve cells have long extensions?
The number of dendrites on a neuron varies. They are called afferent processes because they transmit impulses to the neuron cell body. There is only one axon that projects from each cell body. It is usually elongated and because it carries impulses away from the cell body, it is called an efferent process.
What is the main function of the nerve cell?
Neurons, also known as nerve cells, send and receive signals from your brain. While neurons have a lot in common with other types of cells, they’re structurally and functionally unique. Specialized projections called axons allow neurons to transmit electrical and chemical signals to other cells.
What is nerve cell explain?
(nerv sel) A type of cell that receives and sends messages from the body to the brain and back to the body. The messages are sent by a weak electrical current. Also called neuron.
Is nerve cell elongated in shape?
Nerve cells have a star-shaped body and have long messages.
How does a nerve cell help the organism to work efficiently?
Nerve cells are called neurons . They are adapted to carry electrical impulses from one place to another. 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.
How does the nerve cell adapted to its function?
The nerves cells are rather long which enables communication with distant body parts. The dendrites allow for communication with other neurons. Myelin surrounding the axon of a neuron acts as an insulator.
How long a nerve cell can be?
The length of a nerve cell can vary from nanometers to meters . Yes, it’s true. Our body is composed of millions to billions of nerve cells. Some nerve cells can be comparatively smaller by 0.1 millimeter or can be longer by 1 meter.
Why are nerve cells important?
Transmission of Nerve Impulses. Neurons are some of the most important cells in the body. This is because they are involved in cell communication that, in turn, allows an organism to function as it should in its environment.
What’s the longest nerve in the body?
Sciatic Nerve Anatomy
- The sciatic nerve is the largest and longest nerve in the human body, originating at the base of the spine and running along the back of each leg into the foot.
- The sciatic nerve originates in the lower spine and is responsible for motor and sensory functions of the lower body.
Which cells are long and branched?
The nerve cell or a Neuron is long and branched. Nerve cell helps to transmit messages within our body.