A subjective way of determining the intensity of an aerobic workout would be to: a. Measure RPE b. Measure your heart rate by performing a pulse check c. Have your VO₂ max measured in a lab d. Measure your heart rate by using a heart rate monitor

Which of the following best describes the purpose of the parathyroid hormone? a. it decreases the blood calcium level and decreases blood phosphorus level. b. it decreases the blood calcium level and increases the blood phosphorus level. c. it increases the blood calcium level and increases blood phosphorus level. d. it increases the blood calcium level and decreases blood phosphorus level.