In normal individuals, there is a constant production of ketone bodies by the liver and their utilization by extrahepatic tissues. The concentration of ketone bodies in blood is maintained around 1 mg/dl. Their excretion in urine is very low and undetectable by routine urine tests (Rothera's test).
A: Examples of involuntary muscles, also known as smooth muscles, are the muscles of the urogenital tract, digestive tract, circulatory system and respiratory tract. Involuntary muscles are not controlled by the organism's will. Their actions are automatic and facilitated by the autonomic nervous system.
Cardiac muscle (Involuntary) Voluntary muscles are those that you can conciously control; for example your biceps. Involuntary muscles are controlled by your subconscious and you have no control over them such as your esophagus or stomache (smooth muscle) or your heart (cardiac muscle) Source: Modern Biology by Holt.