Which body systems will be directly affected if a tendon gets torn and cannot function properly? choose all answers that are correct. a. endocrine system b. muscular system c. skeletal system d. circulatory system

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.