This can work for the brain where the neurons can be smaller. Of the tissue which will, with luck, contain all or at least most of some of the cells. by impregnating them with a heavy metal) and to cut a thick section One way round this problem is to stain the neurons heavily (e.g. Is unlikely that one section will contain all parts of the neuron. Of their processes it is difficult to examine the complete structure of an individual neuron in a single conventional sections, as it Therefore, because of their large size, and the length and branching Note the variety both of neuronal shapes and of the branching patterns of their processes.Ĭan you find bipolar, pseudopolar or multipolar neurons?Īs most of the nerve cell bodies are either in the brain or spinal cord, or in ganglia, just outside the spinal cord, and the synapsesĪt the end of the axon can be long distances away (i.e innervating muscles at the end of your foot or arm) the axons can be around 1 meter long! This section shows a thick section from the cerebral cortex, stained using Golgi-Cox method, which stains neurons black. (Fast anterograde flow involves microtubules, and the microtubule motor protein called kinesin.) There is also retrograde flow, in which unused or recycled constituents are returned to the cell body. Returns & exchanges accepted Price: 170+ Original Price: 425+. There is a slow transport system of a few millimetres a day, and a fast system, which is about 100 times faster. NATURAL White Dendrite Opal cabochon,Wire Wraping Dendrite Agate,Handmade Dendrite, Jewelry Making Loose Gemstone Dendrite Agate Pendant. (b) X-ray microtomography images of dendrites with crystallites at their base. The red arrows show the direction of nerve impulse transmission.Īs well as conducting electrical impulses, the cell has to transport proteins, lipids, and other macromolecules,įrom the cell body to the synapses ( anterograde direction), because all of the protein making machinery (ribosomes, endoplasmic reticulum) is in the cell body. (a) A 3D reconstruction of a crystallite at the electrolyte/electrode interface. Long - around 1 metre, and vary in diameter from 0.2 to 20 µm
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