Phlebotomy Technician Practice Exam (NCPT/CPT)

Smooth muscles line the intestines and organs of the human body. This type of muscle is unique in that it is not under conscious control, unlike skeletal muscles. This rules out option B, skeletal muscles, as they are responsible for voluntary movement. Option A, cardiac muscles, is also incorrect as they are specifically found in the heart and not in the intestines or organs. Option D, voluntary muscles, is incorrect as it is another term for skeletal muscles.