The talk test can be used to measure the
A. Knowledge of an activity
B. intensity of an activity
C. length of an activity
D. cost of an activity
Please select the best answer from the choices provided.

Internal feedback works to maintain homeostasis when your a. heart rate decreases as your white blood cells increase b. breathing rate decreases as your red blood cells decrease c. heart rate increases as your liver is cleaning blood d. breathing rate increases as your heart rate increases