2. In this chapter, you learned that some pathogens must attach to host cells to cause disease. To accomplish this, molecules on their surface (adhesins or ligands) recognize and attach to molecules (receptors or integrins) on the surface on certain host cells.
So a chromatic note, is any note you play that is not in the scale you are playing. They are also a great way to practice, especially if you are going through the pentatonic scale. Try adding one of these outside chromatic notes to your scale, and see how it sounds above the chord you are playing over.
Chromatic Colors. Any color in which one particular wavelength or hue predominates. For example, blue and green are chromatic colors, while white, gray, and black are achromatic colors, as they have no dominant hue (all wavelengths are present in equal amounts within those colors). White light is considered achromatic, as it possesses no dominant hue. It is only when one particular wavelength (for example, red) is filtered out that the light becomes chromatic, possessing the color which is the opposite of the light that was filtered.