In this task, you are given a question and an answer, you would be asked to create the sentence based on the Question-Answer provided. It should be contained within the Question-Answer provided.

Question: Calcium ion is an example of what kind of messenger? Answer: second
Calcium ion is an example of a second messenger.

Question: The esophagus runs a mainly straight route through the mediastinum of what? Answer: thorax
The esophagus runs a mainly straight route through the mediastinum of thorax.

Question: Catabolic and anabolic hormones in the body help regulate these? Answer: metabolic processes

Catabolic and anabolic hormones in the body help regulate metabolic processes.