Anabolic Steroids Essay -- Drugs Veterinarian Biochemistry Essays

Anabolic Steroids Of the diagnostic methods available to veterinarians, the clinical chemistry test has developed into a valuable aid for localizing pathologic conditions. This test is actually a collection of specially selected individual tests. With just a small amount of whole blood or serum, many body systems can be analyzed. Some of the more common screenings give information about the function of the kidneys, liver, and pancreas and about muscle and bone disease. There are many blood chemistry tests available to doctors. This paper covers the some of the more common tests. Blood urea nitrogen (BUN) is an end-product of protein metabolism. Like most of the other molecules in the body, amino acids are constantly renewed. In the course of this turnover, they may undergo deamination, the removal of the amino group. Deamination, which takes place principally in the liver, results in the formation of ammonia. In the liver, the ammonia is quickly converted to urea, which is relatively nontoxic, and is then released into the bloodstream. In the blood, it is readily removed through the kidneys and excreted in the urine. Any disease or condition that reduces glomerular filtration or increases protein catabolism results in elevated BUN levels. Creatinine is another indicator of kidney function. Creatinine is a waste product derived from creatine. It is freely filtered by the glomerulus and blood levels are useful for estimating glomerular filtration rate. Muscle tissue contains phosphocreatinine which is converted to creatinine by a nonenzymatic process. This spontaneous degradation occurs at a rather consistent rate (Merck, 1991). Causes of increases of both BUN and creatinine can be divided into three major categoriesprerenal, renal, and postrenal. Prerenal causes include heart disease, hypoadrenocorticism and shock. Postrenal causes include urethral obstruction or lacerations of the ureter, bladder, or urethra. True renal disease from glomerular, tubular, or interstitial dysfunction raises BUN and creatinine levels when over 70% of the nephrons become nonfunctional (Sodikoff, 1995). Glucose is a primary energy source for living organisms. The glucose level in blood is normally controlled to within narrow limits. Inadequate or excessive amounts of glucose or the inability to metabolize glucose can affect nearly every system in the body. Low blood gl... ...ecomes less invasive to the patient. The more information that is made available to the doctor allows a faster diagnosis and recovery for the patient. Bibliography Barrie, Joan and Timothy D. G. Watson. â€Å"Hyperlipidemia.† Current Veterinary Therapy XII. Ed. John Bonagura. PhiladelphiaW. B. Saunders, 1995. Bistner, Stephen l. Kirk and Bistner’s Handbook of Veterinary Procedures and Emergency Treatment. PhiladelphiaW. B. Saunders, 1995. de Morais, HSA and William W. Muir. â€Å"Strong Ions and Acid-Base Disorders.† Current Veterinary Therapy XII. Ed. John Bonagura. PhiladelphiaW. B. Saunders, 1995. Fraser, Clarence M., ed. The Merck Veterinary Manual, Seventh Edition. Rahway, N. J.Merck & Co., 1991. Garrett, Reginald H. and Charles Grisham. Biochemistry. Fort WorthSaunders College Publishing, 1995. Lehninger, Albert, David Nelson and Michael Cox. Principles of Biochemistry. New YorkWorth Publishers, 1993. Schmidt-Nielsen, Knut. Animal PhysiologyAdaptation and environment. New YorkCambridge University Press, 1995. Sodikoff, Charles. Labratory Profiles of Small Animal Diseases. Santa BarbaraAmerican Veterinary Publications, 1995.