Question

What is the difference between positive and negative feedback cycles?

Answer 1

Positive feedback cycles always increase the response. Negative feedback cycles always decrease the response.

Positive and negative feedback mechanisms always work in antagonistic fashion to maintain a homeostatic balance of a parameter such as temperatures or pH in the body. Positive feedback is akin to a gas pedal while negative feedback is akin to a brake and reverse pedal.

Explanation:

An example of a parameter is blood sugar levels. Glucagon is a hormone responsible for positive feedback since it increases blood sugars when levels are low. Insulin, however, is a negative feedback hormone that reduces blood sugars levels when they are elevated. These two work antagonistically to maintain  the right sugar levels in the blood.

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