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gaps (about 1 micrometre long) that occur between the myelin sheaths generated by consecutive Schwann cells. Because the axon membrane is uninsulated at the nodes of Ranvier, it is capable of generating electrical activity here.
simple inorganic chemical substances (mineral salts) that are needed in relatively large amounts...
a structure that is used by molluscs for feeding. It is a minutely toothed, chitinous ribbon...
organic compound that always contains the elements carbon, oxygen and hydrogen. The building...
molecule that forms when carbon dioxide attaches itself to the amino group of a haemoglobin...