Endergonic reactions require energy and include anabolic reactions and the contraction of muscle.
2.
Metabolism is the total of all catabolic, exergonic, anabolic, endergonic reactions.
3.
Nevertheless, endergonic reactions are quite common in nature, especially in biochemistry and physiology.
4.
Examples of endergonic reactions in cells include protein synthesis, and the nerve conduction and muscle contraction.
5.
The concentration of the products of the endergonic reaction thus always remains low, so the reaction can proceed.
6.
In exergonic reactions the ? " G " is negative and in endergonic reactions the ?G is positive:
7.
Energy is required for glycogenesis, and the blood does not deliver energy, just the ingredients for endergonic reactions.
8.
Reagents can be " pulled " through an endergonic reaction, if the reaction products are cleared rapidly by a subsequent exergonic reaction.
9.
In exergonic reactions the ? " G " is negative and in endergonic reactions the ? " G " is positive:
10.
If the products are higher in chemical energy than the reactants then the reaction will require energy to be performed and is therefore an endergonic reaction.
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