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| maintenance of an organism ： ウィキペディア英語版 |
maintenance of an organism
Maintenance of an organism is the collection of processes to stay alive, excluding production processes.
The Dynamic Energy Budget theory delineates two classes
* Somatic maintenance. This comprises mainly the turnover of structural mass (mainly proteins) and the maintenance of concentration gradients of metabolites across membranes (e.g., counteracting leakage). This is related to maintenance respiration.
* Maturity maintenance. This comprises the maintenance of defence systems (such as the immune system), the preparation of the body for reproduction.
The theory assumes that maturity maintenance costs can be reduced more easily during starvation than somatic maintenance costs. Under extreme starvation conditions, somatic maintenance costs are paid from structural mass, which causes shrinking.Some organism manage to switch to the turpor state under starvation conditions, and reduce their maintenance costs.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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