What is the difference between a negative feedback system and a positive feedback system?
(a)- In a negative feedback system, the control center raises or lowers the set point until the signals from the sensor stop; in a positive feedback system, the set point remains constant.
(b)- In a negative feedback system, the organism is most likely experiencing a disease state. In a positive feedback system, the organism is most likely healthy.
(c)- In a negative feedback system, the consequences of the action can harm the animal; in a positive feedback system, the animal is not harmed.
(d)-In a negative feedback system, the control center signals the effector to go "on and off" to maintain a steady state (or stable equilibrium); in a positiv

The negative feedback is responsible for maintaining equilibrium (stability) in a system as it lessens effects, which is contrary to positive feedback which increases reaction and moves a system further away from equilibrium (stability), It does so by amplifying the effects of a product or event and occurs when something needs to happen quickly. e.g

Insulin lowers down blood sugar levels, so when the body detects that it has too much sugar, the pancreas is prompted to release insulin and only stops when balance is achieved; hence, negative feedback.

When there is a tear on the skin, a chemical is released. This chemical causes platelets in the blood to activate, hence they release a chemical which signals more platelets to activate, until the wound is clotted, positive feedback.