Part B
Think about plotting the distances as points on a number line where 0 represents
the position of the Sun. Based on your scaling work in question 1, what is one
challenge of modeling the distances of inner and outer planets using the same
scale? You can create a rough sketch to guide you.

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.