Which of the following statements are true of homeostasis? (Read carefully and select all of the correct statements.)

A)Changes outside the body often bring about changes inside the body.
B)Maintaining homeostasis is the same as maintaining good health.
C)For most aspects of body functioning (e.g., pulse or blood pressure), only a single value is considered normal, therefore an indicator of homeostasis.
D)A positive feedback mechanism is one in which a body function is increased then decreased.
E)A negative feedback mechanism is one in which a body function is always decreased
F)Only negative feedback mechanisms require external brakes, so that the body function will increase again.