When childbirth labor starts, the presence of the hormone oxytocin causes the contractions to increase in strength, which causes the level of oxytocin to increase, which in turn causes the contractions to further strengthen. This would be an example of a ________ feedback mechanism.
A)positive
B)neutral
C)negative

Question

Quizplus · Accepted Answer

Positive feedback mechanisms amplify a stimulus, causing a chain reaction that leads to a greater response. In this case, the presence of oxytocin causes contractions to increase in strength, which in turn causes the level of oxytocin to increase, leading to further strengthening of contractions.

When Childbirth Labor Starts, the Presence of the Hormone Oxytocin