Explain the importance of regulatory mechanisms in living things.  Distinguish between positive and negative feedback.

Describe how blood sugar (e.g. glucose plasma concentration) is regulated with the hormones, insulin, and glucagon. For this feedback loop, identify the following components of the feedback loop: stimulus, receptor, control center, efferent pathway, effector, and response. Be comfortable with this feedback loop to be able to describe the effects of changing various components of the feedback loop.

Biology Question

Why does homeostasis normally involve negative feedback loops rather than positive feedback loops? Provide an example of each.