Given a statement, generate a question such that the answer is contained in that statement.

[EX Q]: a thinning and weakening of bone is an affliction in which osteoclasts are more active than osteoblasts
[EX A]: What are more active than osteoblasts?

[EX Q]: Stimuli can cause the brain to experience pain.
[EX A]: Stimuli can cause the brain to experience what?

[EX Q]: In a human, the nerve pathways link the brain with motor neurons.
[EX A]:
What do nerve pathways link the brain with?