Homeostasis Flashcards
What is the homeostasis?
Homeostasis is the maintenance of a stable internal environment. It involves control systems that keep your internal environment roughly constant
Why is homeostasis important?
It is important as body temperature and pH levels affect enzyme activity, and enzymes control the rate of metabolic reactions.
What is the range for body temperature?
What is the range for blood glucose?
What is the range for Blood pH?
35.8-37.8 degrees C
82-110 mg/dL
7.35-7.45
What happens to the rate of metabolic reactions when the temperature increases?
What happens if the temperature gets too high and what happens to the enzymes because of this?
It increases as well. More heat means more kinetic energy, so molecules move faster.
Then the reaction will essentially stop. This causes hydrogen bonds to break of the enzymes. The active site changes shape meaning the enzyme and substrate won’t be able to fit
What happens of Blood pH gets too high or too low?
The enzymes will start to denature. The iconic and hydrogen bonds that hold them together are broken.
What happens if the blood glucose concentration gets too high?
What will happen if it is too low?
The water potential of blood is reduced to a point where water molecules diffuse out of the cell into the blood by osmosis. This can cause the cells to shrivel up and die.
Cells are unable to carry out normal activities because there isn’t enough glucose for respiration to provide energy
If blood sugars get too high what reacts and what does it release?
If blood sugars get too low what reacts and what does it release?
The pancreas reacts and releases insulin. The insulin takes glucose into the liver and converts it to glycogen
The pancreas reacts and releases glucagon. The glucagon converts glycogen into glucose which is then released from the liver
What is negative feedback?
This keeps things around the normal level. It only works within certain limits. If the change is too big then the effectors may not be able to counteract it.
