Question

select all that apply
which of the following are examples of a positive feedback mechanism? more than one answer may be correct.
□ maintenance of normal blood pressure
□ maintenance of normal body temperature
□ contractions during childbirth
□ formation of a blood clot

Explanation:

Positive - feedback mechanisms amplify a change. During childbirth, uterine contractions stimulate the release of oxytocin which in turn increases contractions. In blood - clot formation, the initial clotting factors activate more clotting factors leading to more clotting. Maintenance of normal blood pressure and body temperature are examples of negative - feedback mechanisms that work to restore a stable state.

Answer:

C. Contractions during childbirth, D. Formation of a blood clot