26 - Homeostasis Flashcards
What is homeostasis?
Constant internal environment
What are the four things that must be regulated in the body?
Ion content
Water content
Sugar content
Temperature
What happens to sodium ions in the body?
Some lost in sweat
Some extracted from blood by kidneys then lost in urine
How is water lost?
Sweat
Breath
Urine
Faeces
What regulates ion content?
Kidneys
What regulates body temperature?
The brain
Which part of the brain acts as a thermostat?
Hypothalamus
What does insulin do?
Helps maintain correct glucose levels
Where does glucose from carbohydrates go?
The gut
How is glucose removed from the gut?
Normal metabolism
Exercise
Why should water and ion content be regulated?
So cells aren’t damaged by too much water going in and out
Why should blood sugar levels be regulated?
For a constant supply of energy
Why should your body temperature be regulated?
For enzymes to work optimally
