7.4 Homeostasis Flashcards
What is Homeostasis?
Maintenance of a stable internal environment.
How is blood used in homeostasis?
It helps maintain stable conditions within the blood by giving rise to the tissue fluid that bathes the body’s cells.
What is water potential determined by?
Concentration of solutes in the blood.
What is regulated in the blood?
Concentration of glucose, ions and carbon dioxide maintained and regulated.
As well as pH and temperature.
What does each condition have? What are homeostatic mechanisms are trying to do?
A norm value or a set point and homeostatic mechanisms are trying to maintain them.
What mechanisms detect deviations from the norm? (3)
Receptors.
Which are connected to control mechanisms
Turns on and off effectors (muscles or glands)
What do effectors do?
Bring the condition back to the norm value.
What is negative feedback?
A deviation from the norm requiring a change in the opposite direction back to the norm.
