Question

which of these is not a function of smooth muscle? pushing blood into the great vessels of the heart adjusting airway diameter elevating skin hairs churning the stomach contents

Explanation:

Smooth muscle is involuntary and found in various organs like the stomach (churning), airways (adjusting diameter). Elevating skin hairs is done by arrector pili muscles (smooth muscle - but this is a wrong association here as the key is that pushing blood into great vessels is the heart's (cardiac muscle) function. Cardiac muscle, not smooth muscle, pushes blood into the great vessels of the heart.

Answer:

pushing blood into the great vessels of the heart