Cell Yeah! Get to know the cell lab Define the following: 1. Cell Culture – the process by which cells are grown under controlled conditions, generally outside their natural environment. 2. Laminar Flow Hood – a carefully enclosed bench designed to prevent contamination of semiconductor wafers, biological samples, or any particle sensitive materials. 3. Hemocytometer – a counting-chamber device originally designed and usually used for counting blood cells. 4. MTT Assay – a colorimetric assay for assessing cell metabolic activity. 5. Fetal Bovine Serum – comes from the blood drawn from a bovine fetus via a closed system of collection at the slaughterhouse. 6. MEF Cells – (MEF Feeder Cells) they secrete several important growth factors into the medium, which help maintain pluripotency, and they provide a cellularmatrix for ES cells to grow. 7. Colormetric – a method of determining the concentration of a chemical element or chemical compound in a solution with the aid of a color reagent. 8. Trypsin – a digestive enzyme which breaks down proteins in the small intestine, secreted by the pancreas as trypsinogen.