When you swallow food why does it not usually enter the respiratory 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.

Based on the data in the graphs do you think pepsin and trypsin are found in the same part of the body? explain your answer.

The means by which a cell transports large molecules out of the cell is called