An overloaded electrical circuit is an example of which type of hazard in the laboratory?

Cardiac patients should be instructed to:

A) take their prescribed medication regularly and report any problems immediately B) eat a low-fat, high-sodium diet C) drink at least one alcoholic beverage a day D) practice stress-inducing behaviors

Muscles in the ________ control the shape of the lens of the eye.

Fill in the blank(s) with the appropriate word(s).