Given scientific fact as input, generate the question from this fact such that it can be answered from the input.

Example Input: When the smooth muscle relaxes, the arterioles dilate, allowing blood to enter the capillaries.
Example Output: When the smooth muscle relaxes, the arterioles dilate, allowing blood to enter the what?

Example Input: Cranium (skull) is the term for the skeletal structure of the head that supports the face and protects the brain.
Example Output: What is the term for the skeletal structure of the head that supports the face and protects the brain?

Example Input: Carbonic acid can dissociate into hydrogen carbonate ions and protons.
Example Output:
Carbonic acid can dissociate into hydrogen carbonate ions and what?