Question

multiple choice question
the pressure of the fetus head on the cervix during labor leads to stronger and more frequent contractions. this is an example of:
negative feedback
homeostasis
an inhibition reflex
positive feedback

Explanation:

• Negative feedback: Works to reverse a change. For example, when body temperature rises, mechanisms act to cool it down. This is not the case here as the process is amplifying (not reversing) the contractions.
• Homeostasis: Refers to the body's ability to maintain a stable internal environment. While feedback mechanisms (both positive and negative) contribute to it, this term alone is too broad and not specific to the amplifying process described.
• Inhibition reflex: Would act to stop or reduce a process. But the pressure is leading to stronger and more frequent contractions (an enhancing, not inhibiting, effect).
• Positive feedback: Enhances or amplifies a change. In labor, the pressure of the fetus’ head on the cervix causes stronger contractions (which in turn increase the pressure further), showing an amplifying (positive feedback) loop.

Answer:

positive feedback