Compare positive and negative feedback mechanisms.

Answer 1

Positive feedback mechanisms amplify or reinforce changes or deviations from a steady state. For example, during childbirth, the hormone oxytocin causes the muscles of the uterus to contract, which stimulates the production of more oxytocin. This positive feedback loop continues until the baby is born.

Negative feedback mechanisms, on the other hand, work to maintain a steady state or balance in a system. Negative feedback reduces or opposes deviations from a steady state. For example, when body temperature rises above a certain level, sweat glands are activated, and blood vessels dilate to release heat. This negative feedback loop results in a reduction in body temperature back to the normal range.

In summary, positive feedback mechanisms amplify a change from a steady state, while negative feedback mechanisms work to maintain or restore a steady state.