Positive and Negative Feedback

Would you expect most feedback loops in your body to negative or positive?

• negative

• positive

What is homeostasis?

• Internal unstable environment

• Internal stable environment 

• external stable environment 

Why would the rat have to eat more than the snake for its body size?

• The snake only uses energy to warm its body temperature when the surrounding temperature is high

• The rat must use a lot of energy to maintain its internal temperature

• The rat has muscles that require much more ATP than snake muscles

What is the main difference between negative and positive feedback loops?

• Negative feedback loops works by maintaining homeostasis, such as maintaining the right temperature of your body. Positive feedback loops do not maintain equilibrium and usually occur when you want something to occur really fast, for example a woman having contractions to give birth to her baby. 

• Possitive feedback loops work by maintaining homeostasis, such as maintaining the right temperature of your body. Negative feedback loops do not maintain equilibrium and usually occur when you want something to occur really fast, for example a woman having contractions to give birth to her baby. 

High blood sugar triggered the release of insulin. What then is a likely effect of the hormone insulin?

• lowering of blood sugar

• increasing blood sugar

Maintaining an stable glucose level is what type of feedback?

• Negative feedback loop because when blood glucose rises, the pancreas releases insulin to bring the blood glucose levels back to normal 

• Positive feedback loop because when blood glucose rises, the pancreas releases insulin to bring the blood glucose levels  back to normal 

Why do Type I diabetics have high blood sugar levels?

• They don't produce enough insulin

• They don't produce enough glucagon

• They make lots of insulin, but their body does not respond to it

BeWhy do most people in the world have diabetis?

• to a great diet 

• Due to a poor diet