Meeting life's necessities is all about maintaining homeostasis
at many levels. For example, cells continually use ATP
to do work, so we need to renew our food supply through consumption of food
, and waste must be excreted
. Failure on one end leads to starvation
, failure on the other leads to toxicity
. Then there are emotional
needs and wants; the need for safety
, the need for self-confidence
, the need for relationship
s, and so on.
Failure to accommodate needs on any level will lead to imbalance, whether detrimental or fatal.
See also Maslow's Hierarchy of Needs.