Immediately after its ATP is consumed, a working muscle relies on DIRECT PHOSPHORYLATION OF ADP BY CREATINE PHOSPHATE to regenerate ATP for contraction. There are three different systems which provide energy for a working muscles depending on the duration of the work that the muscle is doing. Immediately the stored ATP in a muscle is consumed, the first system that will be activated for production of ATP is direct phosphorylation of ADP to ATP. Followed by anaerobic glycolysis and gluconeogenesis.
Passing through clay beds filters groundwater, purifying out soil, or organic materials, and contaminants to leave behind pure water that fills up aquifers.
The mass of an object is a measure of the amount of matter it contains. The weight of an object is a measure of the force exerted on the object by gravity, or the force needed to support it. Mass does not change with gravity as weight does due to the act of pulling down on an object making it in fact heavier.
The mass of a tree is primarily carbon. The carbon comes from carbon dioxide used during photosynthesis. During photosynthesis, plants convert the sun's energy into chemical energy which is captured within the bonds of carbon molecules built from atmospheric carbon dioxide and water.
