Given a passage with a question and an answer to that question, classify if the answer actually answers the question into 'yes' or 'no'. Output 'yes' if the answer answers the question and output 'no' if the answer does not answer the question.

Question: Do values of the bispectral index parallel the hemodynamic response to the rapid increase in isoflurane concentration?
Answer: BIS values decrease after a step increase in volatile agent concentration, whether or not a hyperdynamic action occurs.
no