BIO-GEO CHEMICAL CYCLE OR NUTRIENT CYCLE Bio - Living organism Geo - Rock, Soil, Air, Water Chemical - Material or Nutrients Cycle - Path All the types of material required by ecosystem in addition of energy, are available continuously to system through recycling. Thus there is a constant exchange of materials between the living organism and their abiotic environment through the recyling of materials. This phenomenon is called Bio-geo chemical cycle. Note: Environment factors,e.g soil , moisture, ph, temperature etc, regulate the release of nutrients into the atmosphere. Biochemical cycle The following types of cycle are found in an ecosystem. (i) Gaseous Cycle - C, H, N. O cycles. Reservoir is in the atmosphere (air) or in Hydrosphere(water). Sedimentary cycle - P. S, Ca cycles reservoirs are in earth's crust (lithosphere). Note : In these cycles, the bulk material remains in the inactive reservoir on earth crust like sediment of sea, or water
FUNCTIONS OF LIVER Liver is known as biological and chemical factory of the body. Liver converts ammonia (more toxic) into urea (less toxic). Most of the biochemical functions of the body are done by the liver. 1) Secretion and synthesis of bile - This is the main function of liver. Bile is yellowish-green, alkaline fluid.In bile juice, bile salts, sodium bicarbonate, glycocholate, taurocholate, bile pigments, cholesterol,Lecithin etc. are present. 2) Carbohydrate Metabolism . The main centre of carbohydrate metabolism is liver.Following steps are related with carbohydrate metabolism- Glycogenesis . The conversion and storage of extra amount of glucose into glycogen from the digedf food is called glycogenesis. The main stored food in the liver is glycogen, Glycogenolysis - The conversion of glycogen into glucose again when glucose level in blood falls down is calledglycogenolysis. Gluconeogenesis - At the time of need, liver converts non-carbohydrate co