Which of the following is an example of a positive feedback loop?
A. A hummingbird maintaining a constant internal body temperature
B. A person altering her breathing rate to keep blood pH between 7.35 and 7.45
C. Stress altering the normal menstrual cycle, which delays menstruation, which causes more stress
D. The kidney retaining water when the organism becomes dehydrated
Answer:C
Which of the following is an example of a positive feedback loop?
A. A hummingbird maintaining a constant internal body temperature B. A person altering her breathing rate to keep blood pH between 7.35 and 7.45 C. Stress altering the normal menstrual cycle, which delays menstruation, which causes more stress D. The kidney retaining water when the organism becomes dehydrated