1. The functions required to maintain the body at changing internal and external milieu.
Made by Dorottya Oláh

2. internal milieu effected functions:
For example:
Hormonal changes
Stress
Aging

3. Aging
reduce high frequency hearing, taste, smell, feel, touch & pain sensativity
collagen become less elastic
levels of brain neurotransmitter synthesizing enzyme decrease
function of the immunological system and neuronal conduction velocity deceases
in the central nervous system (CNS) dercease the brain weight and the grey matter content
increase the astroglia number and size and the myelin sheath thickness

4. external milieu effected functions:
For example:
radiation
electrosmog
external pressure
injury
sleep
thermoregulation
feeding/ fluid intake

5. Thermoregulation The cells need specific tempreture
Tempreture receptors
Hypothermia: 35 ° C
Hyperthermia: 42 °C

6. Feeding
Feeding by its nature is intermittent, yet the need for energy in tissues is constant. The remarkable stability of body weight in persons with access to adequate food supplies is testament to the precision by which metabolic needs are monitored and maintained.