Given the task definition and input, reply with output. In this task, you're given a context, further information available on a particular linked term from the statement, and an answer term. Your job is to generate a question that can use the information provided to obtain the given answer. You should use the information on both context and link information to create the question. Note that the answer to the question should be exactly the given answer, and if the answer is none, the answer to the question shouldn't be obtainable from the context or linked information.

Context: Once activated, norepinephrine and epinephrine are released directly into the blood by postganglionic nerve fibers Link Information: none Answer: none

Are the chemicals released at the same time?