Notes+On+Death

Death - When you stop breathing - Heart stops beating for indefinite amount of time - No Pulse - Cessation of Life - Brain activity ceases - Life Support - Body cannot function on own

- Heart stops beating so cells no longer get blood and oxygen supply - Aerobic Respiration stops --> chemical process by which oxygen is used to make energy (ATP) and carbohydrates (sugars) Muscles made of 2 fibers that work together - fibers lock and unlock during muscle contraction and relaxation -controlled by a biochemical pathway in the cells that depend on a presence of oxygen. -Have high levels of calcium in the cell this stimulates muscle contraction -Ca must be removed from the cell in order for the muscle to relax lack of O2 makes impossible to remove Ca -as calcum levels rise muscles stay contracted ---> Rigor Mortis, continues until muscle tissues decompose
 * Chemically and Biologically what during death