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AHS I Muscular System Function Worksheet 1. The correct order of steps that occur when a skeletal muscle contracts is: 2. I __________________ 3. A __________________ 4. A __________________ 5. S _____________ C ___________ 6. S __________________ 7. It is called __________ when muscle cells are stimulated repeatedly without adequate rest, lactic acid accumulates, and the muscle will lose its ability to contract. 8. Muscle ___________ is the term used to mean muscles are partially contracted at all times and are considered to be in a constant state of readiness. 9. _________________ is what a muscle has when it becomes shorter and thicker and causes movement. 10.Which one of these muscle types is considered voluntary? (Circle the correct answer(s)) Visceral Cardiac Skeletal Smooth 11._________________ muscle forms the walls of the heart. 12.________________ are responsible for producing most of our body heat. 13.The end of the muscle that attaches to movable bone is called the ________________. 14.The end of the muscle that attaches to the bone that does not move during contracture is called the ________________. 15. The thoracic muscle which aids in breathing is the __________________. 16.Muscles are able to return to their original shape when they relax. This characteristic is called: ____________________. 17. If a person fails to exercise their muscles the muscles will become weak, flaccid and will _________________. 18.An intramuscular injection given in the arm involves the _______________ muscle. 19.An intramuscular injection given in the buttocks involves the __________________ muscle. 20.The medical term for the calf muscle is the ________________________. 21.The main muscle of the lower back is the __________________________________. 22.The medical term for muscle pain is _________________. 23. The ________________________ is the main muscle of the chest wall. 24. The _______________________ is the muscle used to turn the head. 25. Which muscle is located on the dorsal aspect of the body? (Circle the correct answer) a. Trapezius Word Bank Rectus femoris Biceps (All words will be used except for 2 of them) Axon Impulse Atrophy Cardiac Pectoralis Major Motor Unit Contractibility Fatigue Gluteus Maximus Muscles Gatrocnemius Insertion Latissimus dorsi Tone Acetylcholine Diaphragm Synaptic Cleft Origin Sarcolemma Myalgia Elasticity Sternocleidomastoid Deltoid Extensibility
