To maintain a stable internal state, or homeostasis, the body relies on receptors at or near the body’s surface to sense destabilizing conditions. These receptors send messages to the body’s integrator (the brain), which directs the appropriate effector to respond in a way that maintains homeostasis. Negative feedback occurs when the brain directs an effector to counteract, or negate, whatever is disrupting homeostasis. At times, however, the brain will provide positive feedback instead.

Which would be an example of positive feedback?

Muscle contractions intensify from the initial stage of labor until childbirth.


The slight dilation of the cervix as the infant begins to push its way out of the womb triggers a receptor to send a message to the brain, which then directs the contraction of muscles to help the birth process along. These contractions increase dilation, which triggers additional, and more intense, contractions. This process is a good example of a

Visit our website for other GED topics now!