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Bodybuilding Specialist: Unit 1 Exam 2025 Questions and Answers Muscle - ....ANSWER ...-A group of motor units physically separated by a membrane from other groups of motor units. Smooth Muscle - ....ANSWER ...-Governed by the autonomic nervous system and includes the muscles that line the digestive tract and protect the blood vessels. Cardiac Muscle - ....ANSWER ...-Which includes the heart, as smooth muscle is modulated by the autonomic nervous system. Skeletal Muscle - ....ANSWER ...-Blends into tendinous insertions that attach to bones, pulling on them, which generates desired movement. Motor Unit - ....ANSWER ...-Consists of a single neuron and all the muscle fibers innervated by it. Myofibrils - ....ANSWER ...-Small bundles of myofilaments. Myofilaments - ....ANSWER ...-The elements of the muscle that shorten upon contraction. Myosin - ....ANSWER Actin - ....ANSWER ...-Short, thick filaments that make up part of myofilaments. ...-Long, thin filaments that make up part of myofilaments. …FOR STUDENTS ONLY…©️2025 ALL RIGHTS RESERVED… 1