An external insulin pump is prescribed for a client with diabetes mellitus. The client asks the nurse about the functioning of the pump. The nurse bases the response on the information that the pump:

Gives small, continuous doses of regular insulin subcutaneously, and the client can self-administer a bolus with an additional dosage to coordinate with meals.

Is timed-released programmed doses of regular or NPH insulin into the bloodstream at specific intervals.

Is surgically attached to the pancreas and infuses with regular insulin into the pancreas, which in turn releases insulin into the bloodstream.

Continuously infuses small amounts of NPH insulin into the bloodstream while regularly monitoring blood glucose levels.