Quick Answer. The amount of time it takes for a sound wave to reach the brain is a changing value. The distance of the location from where the sound originates and the type of media the sound travels through are direct factors. Keep Learning.
1 The blood tests most frequently used for liver disease are the aminotransferases (alanine aminotransferase or ALT and aspartate aminotransferase or AST). 2  Normal levels of ALT ranges from about 7-56 units/liter, and 10-40units/liters for AST. Many drugs may cause elevated AST, and ALT and some medications can cause severe damage (for example, acetaminophen [ Tylenol liver damage]). 2  Less common causes of abnormal AST and ALT levels are wide ranging (for example, toxins, and autoimmune diseases).
Best Answer: HEPATIC (LIVER) ENZYME VALUES. AST (Serum Glutamic-Oxalocetic Transaminase - SGOT ) - found primarily in the liver, heart, kidney, pancreas, and muscles. Seen in tissue damage, especially heart and liver. Normal Adult Range: 0 - 42 U/L. Optimal Adult Reading: 21. ALT (Serum Glutamic-Pyruvic Transaminase - SGPT) - Decreased SGPT in combination with increased cholesterol levels is seen in cases of a congested liver.