Colostrum, the yellowish, sticky breast milk produced at the end of pregnancy, is recommended by WHO as the perfect food for the newborn, and feeding should be initiated within the first hour after birth.
The plasma membrane is a fluid mosaic. This means that it is flexible and made up of many different types of molecules. Phospholipids form the basic structure of a cell membrane, called the lipid bilayer. Scattered in the lipid bilayer are cholesterol molecules, which help to keep the membrane fluid consistent. Membrane proteins are important for
EUGENE M. MCCARTHY, PHD. The fluid mosaic model was first proposed by S. J. Singer and G. L. Nicolson in 1972 to describe the structure of cell membranes (Singer and Nicolson 1972).ecause of this fluidity such membranes are often called plasma membranes (one meaning of the word plasma is a complex fluid). The model is called mosaic because it proposes that the membrane is made up of many different parts, including proteins, carbohydrates, and lipids (see figure).