Teacher:You are given a sentence and your task is to generate another sentence that supports the given input.
Teacher: Now, understand the problem? Solve this instance: The significance of these changes lies in the demonstration that they were associated with the release of calcium ion, which as a 'second messenger', was proposed in turn to activate systems that direct development of the early stages of the parasite (94).
Student:
Calcium ion is an example of a second messenger.