1 A thick or coarse purÃ©e of fruit or vegetables. 2  The residue of cooked or uncooked fruit or vegetables after sieving or pressing out the juice. citrus pulp is sometimes used in manufactured orange drinks.  noun material produced from recycled paper, rags or ground wood, mixed with water, used for making paper.
Myelin sheath. (Science: anatomy, neurology) An insulating layer surrounding vertebrate peripheral neurons, that dramatically increases the speed of conduction. It is formed by specialised schwann cells, that can wrap around neurons up to 50 times.
The myelin sheath around most vertebrate axons provides a layer of insulation that prevents the loss of the electrical signal from an action potential. Myelin is lipid rich substance that does not conduct electricity well.ecause of the insulation provided by the myelin, action potentials can travel much more rapidly down myelinated axons than down unmyelinated axons. Myelin also isolates axons from one another in the white matter of the brain preventing the short-circuiting of nerve signals in the central nervous system.