The white blood cells then produce antibodies to match the shape of the antigens. The antigens on the surface of pathogenic cells are different from those on the surface of your own cells. This enables your immune system to distinguish pathogens from cells that are part of your body.he white blood cells then produce antibodies to match the shape of the antigens. The antigens on the surface of pathogenic cells are different from those on the surface of your own cells. This enables your immune system to distinguish pathogens from cells that are part of your body.
The first view is a good way to start thinking about logarithms: logarithms are exponents. That's the view introduced in this section. Another view is that logarithmic functions âundoâ exponential functions, or (more briefly) logs âundoâ exponents. and is the subject of more advanced lessons.
The General Logarithmic Functions. The natural logarithm function is defined as the inverse of the natural exponential function. So it's perfectly natural to define the general logarithmic function as the inverse of the general exponential function. Consider y = 2, the exponential function of base 2, as graphed in Fig. 5.1. Clearly it's one-to-one, and so has an inverse. This inverse is called the logarithmic function of base 2 or logarithm of base 2, and denoted log 2. Thus if y = 2 then x = log 2 y.