Are muscles that contract and relax automatically, without conscious control by the organism. question 7 options:

Involuntary Muscles are the muscles that contract and relax automatically, without conscious control by the organism. They are found in the walls of internal organs such as stomach and intestine and bladder and blood vessels. One important involuntary muscle is the heart, which keeps beating all day and night. 

Ihaven't done that yet, so no idea,but this is not the right place to ask