B1.28-B1.29 Homeostasis and physiological measurements Flashcards
What is Homeostasis?
Maintenance of an almost constant internal environment despite fluctuations in the external environment.
Give some examples of internal environment.
Body temperature
Concentration of blood
Levels of oxygen and C02.
When does negative feedback take place?
When there is movement away from the normal level.
What do receptors do?
Detects blood concentration of glucose
C02 or oxygen
Core body temperature.
Role of effectors
Glands or muscles that make changes such as secretions of hormones or constriction of blood vessels.
What are feedback systems?
Involves a control of coordination center
What is the role of the nervous system within homeostasis?
Involved within regulation of body temperature and heart rate
What is the role of the endocrine system within homeostais?
Regulation of blood glucose and water balance of the body among others.
When enzymes reach a certain temperature being too high or too low, what happens?
They denature.
What do cells need a constant supply of and why?
Glucose and oxygen for aerobic respiration.
Why is regulation of pH important?
As enzymes need a constant pH to function effectively.
For our body to function properly, what is needed?
For our body cells to be bathed in tissue fluid that maintains a constant concentration of water.
