Which of these are skeletal muscles: arrector pili, tongue, muscle in gall bladder, muscles that control movement of the eyeball?
Both tongue muscles and eye ball moving muscles are skeletal and voluntary in nature.
There are four extrinsic and four intrinsic muscles in tongue. Former are attached to hyoid bone, latter are not attached to any bony structure.
Skeletal muscles responsible for moving eye balls are all extrinsic, and there are three pairs of them. They are all attached to orbital bone.