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WHY DO CARDIOMYOCYTES (HEART MUSCLE CELLS) STORE
WHY DO CARDIOMYOCYTES (HEART MUSCLE CELLS) STORE

... The  "Krebs'  Cycle",  otherwise  known  as  the  "Citric  Acid  Cycle",  is  a  well-­‐known   metabolic  pathway.  It  occurs  only  in  the  mitochondrion,  and  is  a  circular  metabolic   route  that  starts  and  ends  with  oxal ...
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... C. The third stage is the citric acid cycle, also known as the Kreb’s cycle. It consists of eight steps that take place in the mitochondria. Acetyl CoA combines with a four-carbon molecule to form a six-carbon citrate molecule. In a series of events, the citrate reforms a four-carbon molecule. With ...
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... - excess production of acid  lower intracellular pH; to prevent further decline of cell pH through production of more acid via metabolism  elevated [H+] concentration inhibits PFK1 to slow acid production Inhibition by citrate - citrate is a feedback inhibitor of glycolysis by allosterically inact ...
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... compounds by combining with carbon, hydrogen and oxygen before it can be absorbed by the plants. • It requires a complex set of enzymes and a huge expenditure of ATP. This is known as nitrogen fixation. • Although the first stable product of the process is ammonia, this is quickly incorporated into ...
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... (Often, catabolic reactions occur in one compartment of a cell, for example, the mitochondria). (Synthetic reaction takes place in another location such as the cytosol or endoplasmic reticulum). Which reaction occur depend on which enzymes are active in a particular cell at a particular time. ATP (a ...
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Gaseous signaling molecules

Gaseous signaling molecules are gaseous molecules that are either synthesised internally (endogenously) in the organism, tissue or cell or are received by the organism, tissue or cell from outside (say, from the atmosphere or hydrosphere, as in the case of oxygen) and that are used to transmit chemical signals which induce certain physiological or biochemical changes in the organism, tissue or cell. The term is applied to, for example, oxygen, carbon dioxide, nitric oxide, carbon monoxide, hydrogen sulfide, sulfur dioxide, nitrous oxide, hydrogen cyanide, ammonia, methane, hydrogen, ethylene etc.Many, but not all, of gaseous signaling molecules are named gasotransmitters.The biological roles of each of the gaseous signaling molecules are in short outlined below.
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