Glycolysis is a body process which involves: a. the passage of water through a semipermeable membrane b. the division of the nucleus of a body cell c. the maintenance of a constant body environment d. the initial breakdown of glucose to pyruvic acid

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.