What's the difference between neuroglia and schwann cells? or are they they same?
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there are several types of neuroglia cells and they are often involved insupportive roles, surrounding the motor and sensory neurons of central nervous system CNS. Schwann cells are the jelly-roll type cells surrounding axons of myelinated nerves in the peripheral nervous system PNS
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Cortical neurons average about 30 microns in a cell culture-somewhat smaller in a brain section.  Hippocampal pyramidal neurons run approximately 40-50 microns, and spinal motorneurons run up to about 80 microns. (If you are working with cortical and striatal neurons, you will likely branch out into hippocampal neurons at some point.) Scanning electron microscopy gives a volume/diameter ratio that indicates a hemispherical shape in cultured neurons, thus the formula would be 0.5 X spherical volume, or:\n(((4 pi)/3)) X  radius cubed) X ).5.  Simplified it would be 2/3 pi X radius cubed.  Thus a largish cortical neurons of diameter 40 microns (40 X 10-6 M) would have a volume of approximately 17000 cubic microns.  Since a mm3 contains 1 billion cubic microns, the volume would be 0.000017 cubic mm, or  0.000000017 ml (a ml contains 1000 mm3).  Thus it would take about 50 million cortical cells to make 1 ml of cells.  When we pellet neurons, we find about 2-4 million cells per 100 ul, so the calculation is good to a factor of 2 or so.
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an immature cell is a newly born cell which was just produced by the process of cell division.it differentiates and matures to form certain kind of cell to perform it's specific function.\nfor example in animals, an immature cell consisting of all the cell organelles, but as u know that the cells in each tissue in an animal's body is so different.thus the immature cell differentiates or develops and takes the form of the cell that is need in the particular tissue.\nsee, a neuron,the nerve cell that is,doesn't have a centriole because the mature neuron cells don't need them as mature neuron cells don't divide,and that is the reason why when one has a head injury,its hard to recover.\ntake for instance an RBC in the blood tissue doesn't have a nucleus while WBCs have differently shaped nucles having lobes or in the shape of kidney etc.\nso this means each tissue has a different cell.hence the immature cells have to develop themselves as per the need of the body.\nsame thing happens in the plant cell . just that the tissues are entirely different from that of the animal's and here in plant cell an immature cell has the ability to divide,called meristematic cell.these cells after the growth of the plant becomes mature,differentiate and form permanent non dividing cells.\nthese permanent cell again de-differentiates for the secondary growth in the plant and starts dividing again.\neach tissue of the plant body has different types of cells...\n\nand chondroblasts are the same in the case of animals.\nthese are cells found in the cartilage tissue.these are immature cells which develops to form mature chondrocytes.\nnote : the cartilage tissue is mostly connected to the areolar connective tissue for the nourishment of the chondrocytes present in the cartilage as the cartilage doesn't have a blood supply but the connective tissue does.and the chondroblasts are the immature cells present in the connective tissue which moves to the cartilage tissue and forms a part of the cartilage as chondrocytes.
201083
I'm not quite sure what you are asking, but I think the answer you want is that each ganglion contains the cell bodies of the sensory neurones.\nUnipolar motor neurones have their cell bodies within the spinal cord.
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well if mitosis is the thing where they divide, then i dont think the nerve cells ever do.
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The answer is C. cochlea since this is the only structure that has nerve cells on your list.\n\nThis answer is the right one for you.\n\nBy the way this sounds like a test question...are you taking a test or doing homework?
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Gray matter refers to the portion of the brain that contains a high proportion of neuronal cell bodies, and is thus darker (because of a higher concentration of mitochondria and cellular nuclei), while white matter has a high proportion of axons and dendrites covered with myelin, and is lighter because of the high fat content.  In a living brain, though, gray matter is darkish pink, and white matter is light pink.  It only turns gray and white after being fixed, as in formaldehyde.
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Unfortunately there isnt any average cell-as said before, there is variation from minutes, in the case of some immune and germ cells, to never in the case of most neurons.  But, to give you a way to answer your homework, you can say a hypothetical cell takes 24 hours to divide-there are quite a few cell types that take about this long, so you would be safe choosing this time.
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neuritis is inflammation of a nerve(s)\nneuralgia is nerve-type pain, i.e. sharp, hot, with tingling or numbness, as opposed to 'myalgia' muscle type pain, which is dull and achy.\nI imagine the last one refers to nerves that are key to muscle contraction. they hook into the motor endplates of the muscle.
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neurons come in many different sizes but you can assume the cell body of one neuron is 10 microns wide.  Some neurons are very short...less than a millimeter in length. Some neurons are very long...a meter or more! The axon of a motor neuron in the spinal cord that innervates a muscle in the foot can be about 1 meter (3 feet) in length.  http://faculty.washington.edu/chudler/what.html\n\nMost plant cells range in size between 10 and 50 micrometers.\nhttp://www.beyondbooks.com/lif71/4.asp
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They all look different, just do a use a search engine on the web and you can find picture of all of them. A Bone cell looks very different from any other cell in the body. Intestinal cells look different depending on if it is small of large intestine and skin cell are different depending on which of the three layers you are looking at. But there are pictures on the web of  all of them.
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There is debate about whether neural stem cells, or other types of adult stem cells exist. When talking about adult stem cells, it's important to define what a stem cell is. Cells can be totipotent, pluripotent, or multipotent.\n\nCells that are totipotent are capable of growing into a complete organism and can contribute to all tissues, including placenta. Cells that are pluripotent can contribute to all tissues, but cannot form placenta, and thus cannot form a complete organism. Cells that are multipotent can become more than one type of cell, but are already committed to a certain type of fate. An example would be a bone marrow stem cell that can become any of the types of blood cells, but can't become anything else.\n\nSome research has suggested that some multipotent cells can reverse their fate restrictions and become more types of cells. This is still very controversial and it may or may not actually happen. Something to keep in mind is that this is similar to what cancer cells do. Adult stem cells may have some strong similarities to cancer forming cells.\n\nEmbryonic stem cells remain the most viable scientific choice for therapeutics.
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Human cells and animal cells are very similar. Actually, human cells are types of animal cells. Every different tissue in your body is made up of different kinds of cells. They may have different structures, especially in their cell membrane, which make the function of that cell different. Therefore they do have similar functions, depending on their structure and characters.
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Stem cells have the ability to differentiate into many different types of cells, they are called pleuripotent.  Regular cells do not have the ability to differentiate into any other kind of cell and the division of a regular cell will result in an identical and functionally similar daughter cell.  Stem cells can divide and one daughter cell may differentiate into a neuron and the other daughter cell may differentiate into a kidney cell.
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Schwann cells are derived from the neural crest.
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I. COMPARISON OF SOMATIC AND AUTONOMIC NERVOUS SYSTEMS (ANS)\n\n     A. Sensory neurons of the somatic nervous system receive input from the special senses, general somatic senses, and proprioceptors; sensory neurons of the ANS receive input from the special senses, general visceral senses, and general somatic senses.\n\n     B. The somatic nervous system operates under conscious control; the ANS operates without conscious control.\n    \n     C. The axons of the motor neurons of the somatic nervous system extend from the CNS synapse directly to an effector and release acetylcholine, whereas autonomic pathways consist of two sets of motor (efferent) neurons.\n\n        1. The axon of the first (preganglionic) motor neuron of the ANS extends from the CNS and synapses in a ganglion with the second neuron.\n        2. The second (postganglionic) motor neuron synapses on an effector. Preganglionic fibers release the neurotransmitter acetylcholine and postganglionic fibers release acetylcholine or norepinephrine. \n\n     D. Somatic nervous system effectors are skeletal muscles, and ANS effectors include cardiac and smooth muscle, and glands.\n    \n     E. The somatic nervous system responds to neurotransmitters as excitation while the ANS response to neurotransmitters is excitation or inhibition.\n\n     F. A summary of the similarities of and differences between the somatic and autonomic nervous systems is presented.\n\n     G. The output (efferent) part of the ANS is divided into two principal parts: the sympathetic and the parasympathetic. Organs that receive impulses from both sympathetic and parasympathetic fibers are said to have dual innervation. III. \n\nANATOMY OF AUTONOMIC MOTOR PATHWAYS\n\n     A. Overview\n\n        1. Preganglionic neurons are myelinated; postganglionic neurons are unmyelinated.\n         2. The first of two autonomic motor neurons is called a preganglionic neuron.\n             a. Its cell body is in the brain or spinal cord.\n             b. Its myelinated axon, called a preganglionic fiber pathway, passes out of the CNS as part of a cranial or spinal nerve, later separating from the nerve and extending to an autonomic ganglion where it synapses with the postganglionic neuron.\n        3. The postganglionic neuron pathway, the second neuron in the autonomic motor circuit, lies entirely outside the CNS.\n            a. Its cell body and dendrites are located in an autonomic ganglion, where it makes synapses with one or more preganglionic fibers.\n            b. The axon of a postganglionic neuron, the postganglionic fiber, is unmyelinated and terminates in a visceral effector. \n         4. The cell bodies of sympathetic preganglionic neurons are in the lateral gray homs of the 12 thoracic and first 2 or 3 lumbar segments; the cell bodies of parasympathetic preganglionic neurons are in cranial nerve nuclei (III, VII, IX, and X) in the brain stem and lateral gray horns of the second through fourth sacral segments of the cord.\n         5. Autonomic ganglia are classified as:\n              a. sympathetic trunk (vertebral chain) ganglia (on both sides of spinal column)\n              b. prevertebral (collateral) ganglia (anterior to spinal column);\n              c. parasympathetic terminal (intramural) ganglia (near or inside visceral effectors). 6. In addition to autonomic ganglia, the ANS contains autonomic plexuses. \n\n     B. Sympathetic and Parasympathetic Divisions\n\n         1. Sympathetic preganglionic neurons synapses with postganglionic neurons in ganglia of the sympathetic trunk or prevertebral ganglia.\n         2. Parasympathetic preganglionic neurons synapses with postganglionic neurons in terminal ganglia.\n        3. The salient anatomical features of the sympathetic and parasympathetic divisions are compared. \n\nTransmission of Autonomic Stimuli\n\nLike other nerves, those of the autonomic nervous system convey their messages to the appropriate end organs (blood vessels, viscera,
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Efferent (motor) neurons appear how nerve cells are typically drawn - short dendrites and a long axon. Almost all efferent nerve cell bodies are located in the central nervous system (the brain and spinal cord).  Motor neurons conduct signals from your brain to cause muscles to move, so this makes a kind of sense.\n\nAfferent (sensory) nerves are structured oppositely - they have long dendrites and a short axon. Almost all afferent cell bodies are located in the peripheral nervous system.  These are cells that detect various sensory inputs and relay the signals through your central nervous system to your brain.