Medical laboratory technologists and technicians can obtain a general certification as a medical laboratory technologist or technician, respectively, or a certification in a specialty, such as cytotechnology or medical biology.
Ergosterol (ergosta-5,7,22-trien-3Î²-ol) is a sterol found in cell membranes of fungi and protozoa, serving many of the same functions that cholesterol serves in animal cells.ecause ergosterol is present in cell membranes of fungi, yet absent in those of animals, it is a useful target for antifungal drugs. Ergosterol is also present in the cell membranes of some protists, such as trypanosomes. This is the basis for the use of some antifungals against West African sleeping sickness.
Cholesterol, bile acids, and steroid hormones. In humans cholesterol and cholesterol derivatives (steroid hormones, bile acids) are essential metabolites for the physiological integration of the body of the endocrine system, regulation of cell membrane processes, and adsorption of dietary lipids.teroid hormones are cholesterol derivatives in animals that are used for a broad range of signaling mechanisms. Cholesterol is hydroxylated and shortened (removing the the C6 hydrophobic side chain at position C21) to the C21 intermediates pregnenolone and progestagen.