Mirror neurons: a definition. Description: Professor Christian Keysers explains that mirror neurons in the premotor cortex respond when we perform an action and also when we see someone else perform that action. This is similar to empathy. Transcript: Mirror neurons are a set of neurons that we discovered in the premotor cortex of the monkey.
lectin. [ 1 lekâ²tin] 2  a protein in seeds and other parts of certain plants that binds with glycoproteins and glycolipids on the surface of animal cells, causing agglutination. Some lectins agglutinate erythrocytes in specific blood groups, and others stimulate the production of T lymphocytes.
Pectin is a soluble fiber rich in galactoside residues. It is present in most plants but is concentrated in the peel and pulp of citrus fruits, and in apples. Pectin is used as a gelling agent in food. It is also used as a remedy for diarrhea and for lowering cholesterol.