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

[Q]: Opaque is the term for matter that does not let any light pass through.
[A]: What is the term for matter that does not let any light pass through?


[Q]: Stimulation of triglyceride breakdown is the first direct action of growth hormone.
[A]: What is the first direct action of growth hormone?


[Q]: Examples of organ systems in a human include the skeletal, nervous, and reproductive systems.
[A]:
Examples of organ systems in a human include the skeletal, nervous, and what?