Exam 2 Ch. 10, 11, 12, 13, 14, 15, 16 1. Which of the following characteristics can be used to differentiate cardiac muscle from smooth muscle tissue? a. Involuntarily controlled b. Presence of intercalated discs c. Presence of sarcomeres d. All of the above characteristics can be used to differentiate the two tissues e. Only answers A and B can be used to differentiate the two tissues f. Only answers B and C can be used to differentiate the two tissues 2. Which of the following correctly orders the structures of skeletal muscle from largest to smallest? a. Fascicle, skeletal muscle cell, myofibril, sarcomeres b. Sarcomeres, myofibril, skeletal muscle cell, fascicle c. Myofilament, fascicle, skeletal muscle cell, myosin d. Myosin, skeletal muscle cell, fascicle, myofilament e. Skeletal muscle cell, sarcomere, fascicle, myofilament f. Myofilament, fascicle, sarcomere, skeletal muscle cell 3. Which structure of a skeletal muscle releases calcium ion in response to the arrival of the action potential? a. Neuromuscular junction b. Sarcolemma c. T-tubule d. Terminal cisternae e. Troponin-tropomyosin complex f. Sarcomere 4. Which of the following statements is true of thin filaments? a. Found in the I-band b. Contains actin c. Contains tropomyosin d. Contains heads that burn ATP during muscle contraction e. All of the above are true statements of thin filaments f. Only answers A, B, and C are true of thin filaments