Which of these statements concerning positive feedback is true? Explain or correct the false statements.

a. _____ Positive feedback responses maintain homeostasis.

b. _____ Positive feedback responses occur continuously in healthy individuals

c. _____ Birth is an example of a normally occurring positive feedback mechanism.

d. _____ When the cardiac muscle receives an inadequate supply of blood, positive feedback mechanisms increase blood flow to the heart.

e. _____ Medical therapy seeks to overcome illness by aiding positive feedback mechanisms.