![]() A group of connected neurons is called a neural circuit, involving sensory, motor, and interneurons. This process is partly electrical and partly chemical and can be excitatory or inhibitory. Usually, axons send out signals and dendrites receive signals across the synapse, although synapses can also connect an axon to another axon or a dendrite to another dendrite. Neurons communicate with other cells over synapses, or gaps between the neurons. They have no myelin sheath around them and have branches near the cell body of the neuron.Most neurons have a cell body, an axon, and dendrites. Dendrites contain Nissl’s granules and have ribosomes. And if dendrites are connected to the dendrite of another neuron, it is known as dendrodendritic. If dendrite of one neuron is connected to the axon of the other neuron, it is known as axodendritic. Dendrites are numerous in a single neuron and are relatively shorter as compared to axons it also has many branches that are present only at its origin. Dendrite receives information from the surroundings and transmits it forward to the cell body and axon of a neuron. ![]() Axons have a nonuniform diameter and a rough surface. Its function is to receive information from the center and transmit it to the cell body of the neuron. What are Dendrites?ĭendrite is derived from a Greek word which means tree. Axons also form neuromuscular junctions at muscle by directly ending on them. And if axon of one neuron is connected directly to the soma, it is known as axosomatic. If axon of one neuron is connected to the dendrite of another neuron, it is called axodendritic. Axons end via a synapse, if axon of one neuron is connected to the axon of another neuron, it is called axoaxonal. Unmyelinated axons lack myelin sheath around them. Myelin sheath act as an insulator and also forms Nodes of Ranvier which help in salutatory conduction. Myelinated axons have myelin sheath around them. Axons are of two types: myelinated axons and unmyelinated axons. It also has calcium (Ca) channels in its membrane. Axons also have many vesicles in them in which different neurotransmitter are present. Note that axon has branches only at its terminal. Axons are usually long, and they end as axon terminal on the other neuron or part of the body. It has many sodium (Na) channels in them which help in the generation of action potential throughout neuron. Axon begins as axon hillock, which is a swelling at the junction between soma and axon of a neuron. Axons have a uniform diameter and a smooth surface. Its function is to transfer information from the body of the neuron to the other part of the body or the another neuron. Key DifferencesĪxon is derived from a Greek word which means axis. Dendrites are multiple in number and short while axon is single but varies in length. Dendrites receive information from the external or internal environment and transmit information to the cell body and axon of a neuron. In simple words, axons are the output of neuron and dendrites are the input of the neuron. Whereas, a dendrite is a short part extension of a neuron by which impulses are received from the center and are further transmitted to the cell body or axon of a neuron. Axon is the long threadlike part of a neuron along which the nerve impulse travel from the cell body to other parts. Axons and Dendrites are the part of the neuron. It is defined as a specialized cell that transmits nerve impulses it is also called a nerve cell. The basic unit of the central nervous system is neuron. It has nerves that transmit signals from central nervous system to the parts of the body. Central nervous system is one of a chief system of our body.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |