instruction:
Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
question:
When the smooth muscle relaxes, the arterioles dilate, allowing blood to enter the capillaries.
answer:
When the smooth muscle relaxes, the arterioles dilate, allowing blood to enter the what?


question:
Some gametophytes develop underground and form mycorrhizal associations with fungi.
answer:
Some gametophytes develop underground and form mycorrhizal associations with what?


question:
The small intestine begins in the stomach.
answer:

Where does the small intestine begin?