4. What is an example of positive feedback? a. Regulating blood glucose levels

b. Maintaining internal body temperature

c. Producing milk in nursing mothers

C

Explanation:

It is known as lactation. The suckling action of an infant produces prolactin, which leads to milk production; more suckling leads to more prolactin, which in turn leads to more lactation. This is a positive feedback system as the product (milk) produces more suckling and more hormone. When the child is no longer breast feeding, the prolactin drops off and milk production goes down.

b brown mice / white sand dunes