Show picture of dendrite and axon2/11/2024 ![]() Nissl’s GranulesĪxon:Axons do not contain Nissl’s granules.ĭendrite: Dendrites contain Nissl’s granules. VesiclesĪxon:The synaptic knobs of the axons contain vesicles with neurotransmitters.ĭendrite:Dendrites do not have vesicles that contain neurotransmitters. Synaptic KnobsĪxon:The tips of the terminal branches of the axon are enlarged to form synaptic knobs.ĭendrite: No synaptic knobs occur at the tips of the branches of the dendrites. Branchingĭendrite:Dendrites are branched all along. Diameterĭendrite: Dendrites have tapering ends therefore diameter continuously decreases. LengthĪxon: Axons are very long (several meters).ĭendrite: Dendrites are very short (around 1.5 mm). OriginĪxon: An axon arises from a conical projection called axon hillock.ĭendrite:Dendrites arise directly from the nerve cell. Numberĭendrite:A nerve cell has many dendrites. Both axon and dendrite contain neurofibrils.ĭifference Between Axon and Dendrite DefinitionĪxon:Axon is the long thread-like part of a nerve cell which conducts nerve impulses away from the cell body.ĭendrite: Dendrite is the short branched extension of a nerve cell, which transmits nerve impulses to the cell body from synapses.Both axon and dendrite are branched structures.Both axon and dendrite transmit nerve impulses.Both axon and dendrite are projections of the cell body of a nerve cell.Since dendrites are short projections, they are not myelinated. A cross-section of an axon is shown in figure 1.ĭendrites possess tapering ends. The axon hillock is the initial segment of an axon. Vesicles that contain neurotransmitters are present in the axon terminals to transmit the nerve impulses by means of chemical signals through the synaptic gap. The membrane of the axon terminal is linked to the membrane of the target cell. The axon terminals form the synaptic connection with a dendron of another neuron or with an effector organ. The axon terminals are the swollen ends of the telodendria. ![]() ![]() The tips of the branched ends are formed by telodendria. Axons are branched at their terminal ends. The membrane that covers the axon is called the axolemma. Axons carry nerve impulses away from the cell body. Key Terms: Axon, Axon Hillock, Cell Body, Dendrites, Myelin, Myelinated Nerve Fibers, Nerve Cells, Non-Myelinated Nerve FibersĪn axon is single, long projection of a nerve cell. What is the Difference Between Axon and Dendrite What are the Similarities Between Axon and DendriteĤ. The main difference between axon and dendrite is that axon carries nerve impulses away from the cell body whereas dendrites carry nerve impulses from synapses to the cell body. The short structures that extend from the cell body are called dendrites. An axon is a long conical prolongation of the cell body of the nerve cell. They transmit nerve impulses to the brain, spinal cord, and to the body to coordinate the functions of the body. Nerve cells are the structural and functional units of the nervous system of animals. Most neurons fire in this way, but not all neurons are the same.Axon and dendrite are two components of nerve cells. This movement of a signal down a neuron is called an action potential. Once the electrical current reaches the end of the cell, it causes other chemicals to be released. These movements travel down the axon, like dominoes that have been tipped over. Ions, which are small, charged molecules, move in and out of entrances in the membrane. Then, the electrical nerve signal travels along an axon in a rush of chemistry. If the combination of neurotransmitters is correct, then they can cause an electrical current to sweep down the nerve cell. Nerve cells communicate with each other using chemicals called neurotransmitters. Nerve signals actually come down to some interesting chemistry. Let's look a bit closer at how this all works. As a final step, the signal leaves through the synapse to be passed along to the next nerve cell. Myelin sheaths cover the axon and work like insulation to help keep the electrical signal inside the cell, which makes it move more quickly. Next, the signal leaves the soma and travels down the axon to the synapse. From there, the signal travels to the main cell body, known as the soma. Neurons receive these signals from neighbor neurons through their dendrites. Other signals are instructions for your organs, glands and muscles. Some of these signals bring information to the brain from outside of your body, such as the things you see, hear, and smell. Neurons pass messages to each other using a special type of electrical signal. From there the message can move to the next neuron. The message then moves through the axon to the other end of the neuron, then to the tips of the axon and then into the space between neurons. Nerve Cell: Dendrites receive messages from other neurons.
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