Homeostasis Flashcards
The optimum point is…
the point at which the system operates best
The receptor …
detects any changes from the optimum point
The coordinator …
coordinates info from receptors and sends info to effectors
The effector …
is a muscle/gland that brings about the change to restore the optimum point
What is homeostasis?
How the internal environment u]is maintained within set limits around optimum
Why should core temp. remain stable?
Maintain a stable rate of enzyme-controlled reactions and prevent damage to membranes.
(denaturation and lack of KE)
Importance of blood pH being stable
Maintain a stable rate of enzyme-controlled reactions.
(denaturation of enzymes due too acidic pH)
Importance of blood glucose being stable
Maintains a constant blood water potential to prevent osmotic lysis
Maintains constant conc of respiratory substrate
Negative feedback is …
self regulatory mechanisms return internal environment to optimum when there is a fluctuation
Positive feedback is …
A fluctuation triggers changes that result in an even greater deviation from the normal level
General stage involved in negative feedback
Receptor detects deviation > coordinator .> corrective mechanism by effector > receptors detect that conditions have returend to normal
Glycogenesis is…
liver converts glucose into glycogen
Glycogenolysis is…
liver hydrolyses glycogen into glucose which can diffuse into blood
Gluconeogenesis is …
liver converts glycerol and amino acids into glucose
