About Nervous System
In short
Nerve cells are different kinds of cells compared to ordinary cells. There are mainly three kinds of nerves,
1.Sensory Neuron
2.Intermediate Neuron
3. Mortar Neuron
All these are connected to the Central Nervous System, which means the brain and the spinal cord. So when the sensory nerves recieve some kind of stimulus, that impulse is send along the dendrons to the spinal cord and the brain. A response is generated by the brain or the spinal cord (if the response is urgent) and is sent along the intermediate neuron to the dendrons of the mortar neuron. Along that, the impulse travel to the target muscle or the organ.
OR
In detail
Many nerve cells are of the basic type illustrated above. Some kind of stimulus triggers an electric discharge of the cell which is analogous to the discharge of a capacitor. This produces an electrical pulse on the order of 50-70 millivolts called an action potential. The electrical impulse propagates down the fiber-like extension of the nerve cell (the axon). The speed of transmission depends upon the size of the fiber, but is on the order of tens of meters per second - not the speed of light transmission that occurs with electrical signals on wires. Once the signal reaches the axon terminal bundle, it may be transmitted to a neighboring nerve cell with the action of a chemical neurotransmitter.
The dendrites serve as the stimulus receptors for the neuron, but they respond to a number of different types of stimuli. The neurons in the optic nerve respond to electrical stimuli sent by the cells of the retina. Other types of receptors respond to chemical neurotransmitters.
The cell body contains the necessary structures for keeping the neuron functional. That includes the nucleus, mitochondria, and other organelles. Extending from the opposite side of the cell body is the long tubular extension called the axon. Surrounding the axon is the myelin sheath, which plays an important role in the rate of electrical transmission. At the terminal end of the axon is a branched structure with ends called synaptic knobs. From this structure chemical signals can be sent to neighboring neurons.
In short
Nerve cells are different kinds of cells compared to ordinary cells. There are mainly three kinds of nerves,
1.Sensory Neuron
2.Intermediate Neuron
3. Mortar Neuron
All these are connected to the Central Nervous System, which means the brain and the spinal cord. So when the sensory nerves recieve some kind of stimulus, that impulse is send along the dendrons to the spinal cord and the brain. A response is generated by the brain or the spinal cord (if the response is urgent) and is sent along the intermediate neuron to the dendrons of the mortar neuron. Along that, the impulse travel to the target muscle or the organ.
OR
In detail
Many nerve cells are of the basic type illustrated above. Some kind of stimulus triggers an electric discharge of the cell which is analogous to the discharge of a capacitor. This produces an electrical pulse on the order of 50-70 millivolts called an action potential. The electrical impulse propagates down the fiber-like extension of the nerve cell (the axon). The speed of transmission depends upon the size of the fiber, but is on the order of tens of meters per second - not the speed of light transmission that occurs with electrical signals on wires. Once the signal reaches the axon terminal bundle, it may be transmitted to a neighboring nerve cell with the action of a chemical neurotransmitter.
The dendrites serve as the stimulus receptors for the neuron, but they respond to a number of different types of stimuli. The neurons in the optic nerve respond to electrical stimuli sent by the cells of the retina. Other types of receptors respond to chemical neurotransmitters.
The cell body contains the necessary structures for keeping the neuron functional. That includes the nucleus, mitochondria, and other organelles. Extending from the opposite side of the cell body is the long tubular extension called the axon. Surrounding the axon is the myelin sheath, which plays an important role in the rate of electrical transmission. At the terminal end of the axon is a branched structure with ends called synaptic knobs. From this structure chemical signals can be sent to neighboring neurons.
12
keywords: work,How,does,nervous,cell,How does nervous cell work