Homeostasis Flashcards
What is the aim of any living system?
Maintain dynamic order through regulating flow
What is entropy?
Disorder
Does homeostasis require energy?
Constantly to maintain high levels or order and coordinate information release.
How do we maintain precise regulation using control mechanisms?
Molecular signals
Is a molecular signals meaning inflexible?
No it is is flexible and modulated by other signalling molecules. The signals are highly specific in a system despite their flexibility.
What does pharmacology study?
The effect of molecules with defined effects on physiological and biochemical activity of cells up through to the level of the person.
How do we classify signal molecules?
Endogenous (naturally occurring with in our body)
Exogenous 1 (found in nature eg antibiotics)
Exogenous 2 (synthetic and man made compounds)
How do we keep cell environments optimal?
Stable extracellular environment
Intracellular dynamic matter energy field interactions Keats within performance limits.
What must we control in the extracellular environment of a cell?
Temperature, pH, O2, CO2, H2O, Na+, K+, Ca2+, Cl- and glucose.
State the three environments homeostasis must control the interchange of. Also include how tightly controlled they are.
External environment is uncontrolled and open meaning parameters are wide.
Extracellular environment is highly controlled and responds to any variability. This is a closed loop meaning the parameters are tight.
Intracellular is highly controlled and adjusts according to control signals. This is a closed loop which keeps the cell with in wider dynamic performance min its (heterostasis).
