Smooth muscles found in walls of _
Hollow structures
(Gut, blood vessels, bladder)
Acts to regulate size of _
Lumen
(Central space)
Also causes wavelike peristalsis in organs such as (2)
Gut
Ureters
Smooth muscle in skin acts upon _
Hairs
Smooth muscle in eyeball determines pupil size and thickness of _
Lens
Smooth muscle can keep up _ for long period of time
Steady contractions