Changes

==Etymology==

==Etymology==

[https://nordan.daynal.org/wiki/index.php?title=English#ca._1100-1500_.09THE_MIDDLE_ENGLISH_PERIOD Middle English], from Anglo-French, from maintenir

[https://nordan.daynal.org/wiki/index.php?title=English#ca._1100-1500_.09THE_MIDDLE_ENGLISH_PERIOD Middle English], from Anglo-French, from maintenir

*Date: [http://www.wikipedia.org/wiki/14th_Century 14th century]

*Date: [https://www.wikipedia.org/wiki/14th_Century 14th century]

==Definitions==

==Definitions==

81 : the [[act]] of maintaining : the [[state]] of [[being]] maintained : [[support]]

81 : the [[act]] of maintaining : the [[state]] of [[being]] maintained : [[support]]

<center>For lessons on the [[topic]] of '''''Maintenance''''', follow [https://nordan.daynal.org/wiki/index.php?title=Category:Maintenance '''''this link'''''].</center>

<center>For lessons on the [[topic]] of '''''Maintenance''''', follow [https://nordan.daynal.org/wiki/index.php?title=Category:Maintenance '''''this link'''''].</center>

==Description (Biology)==

==Description (Biology)==

'''Maintenance''' of an [[organism]] is the collection of [[processes]] to stay alive, excluding production processes. [http://en.wikipedia.org/wiki/Dynamic_Energy_Budget The Dynamic Energy Budget] [[theory]] delineates two classes.

'''Maintenance''' of an [[organism]] is the collection of [[processes]] to stay alive, excluding production processes. [https://en.wikipedia.org/wiki/Dynamic_Energy_Budget 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.

*'''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 [[defense]] systems (such as the [http://en.wikipedia.org/wiki/Immune_system immune system]), the [[preparation]] of the [[body]] for reproduction.

*'''Maturity maintenance'''. This comprises the maintenance of [[defense]] systems (such as the [https://en.wikipedia.org/wiki/Immune_system 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 organisms manage to switch to the [http://en.wikipedia.org/wiki/Turpor turpor] state under starvation conditions, and reduce their maintenance costs.

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 organisms manage to switch to the [https://en.wikipedia.org/wiki/Turpor turpor] state under starvation conditions, and reduce their maintenance costs.

[[Category: General Reference]]

[[Category: General Reference]]

[[Category: Biology]]

[[Category: Biology]]