What is maximum heart rate? a. Your heart rate when you are in a complete state of rest

b. Your heart rate when your heart is working at its maximum

c. Your heart rate before you exercise

d. Your heart rate after you recover from exercise

Which of the following is a true statement? a. the male sex hormone is called estrogen. b. the female sex hormone is called testosterone. c. both sexes manufacture some amount of the sex hormone associated with the opposite sex. d. only males secrete testosterone and only females secrete estrogen

What system have glands found throughout the body that release hormones into the bloodstream

Which of the following processes does the body not use protein to perform? a. repairing muscles b. producing hormones c. making hemoglobin d. creating amino acids