Chapter 10: Muscle Tissue Principles of Anatomy and Physiology, 12th Edition, by Bryan Derrickson, Gerald Tortora.

Principles of Anatomy and Physiology, 12th Edition, by Bryan Derrickson, Gerald Tortora. Multiple Choice & Essays 1. How much of the total body weight of the average adult is muscle tissue? a. 20-30% b. 30-40% c. 40-50% d. 50-60% e. 60-70% Ans: C Difficulty: medium Feedback: Chapter Opener 2. The different types of muscle tissue differ from each other by: a. Microscopic anatomy b. Location c. Type of Control d. Both a and b e. All of the above Ans: E Difficulty: medium Feedback: 10.1 3. Compare and contrast the functional and structural characteristics of muscular tissue. Ans: Both cardiac and skeletal muscle tissues are striated and smooth muscle is not, hence its name. Skeletal muscle cells have more than one nucleus, are large and run parallel to each other. Cardiac muscle cells usually have only one, sometimes two, nuclei and are branched. They also are connected to each other via gap junctions. Smooth muscle cells are small but form thick layers of hollow organs. Like cardiac muscle cells, some smooth muscle cells communicate via gap junctions. Skeletal muscle is voluntarily controlled while both cardiac and smooth muscle tissue are involuntary. Difficulty: hard Feedback: 10.1 4. Which of the following is NOT a major function of muscle tissue. a. Moving blood throughout the body b. Generating heat through contractions c. Stopping the movement of joints d. Promoting movement of body structures e. Storing energy Ans: E Difficulty: medium Feedback: 10.1 5. This is the property of muscle that gives it the ability to stretch without damage. a. Electrical excitability b. Contractility c. Extensibility d. Elasticity e. Thermogenesis Ans: C Difficulty: easy Feedback: 10.1 6. In an isometric contraction the muscle develops tension but does not a. Lengthen b. Widen c. Shorten d. Conduct electrical current e. Exhibit elasticity Ans: C Difficulty: medium Feedback: 10.5 7. This is a band of connective tissue that surrounds muscles. a. Tendon b. Ligament c. Endomysium d. Epimysium e. Perimysium Ans: D Difficulty: Easy Feedback: 10.2 8. When connective tissue extends as a broad flat layer, the tendon is referred to as a. Perimysium b. Deep fascia c. Fascicle d. Aponeurosis e. Endomysium Ans: D Difficulty: easy Feedback: 10.2 9. For every nerve that penetrates a skeletal muscle there are general how many arteries and veins? a. One artery and one or two veins b. Two arteries and two veins c. Three arteries and two veins d. One artery and three veins e. One artery and a varied amount of veins Ans: A Difficulty: hard Feedback: 10.2 10. Axon terminal clusters at the ends of neuromuscular junctions are referred to as: a. Myelin bulbs b. Neuromuscular bulbs c. Synaptic end bulbs d. Axon collateral bulb e. Tubule bulb Ans: C Difficulty: easy Feedback: 10.3 11. After the fusion of myoblasts, the muscle fiber loses its ability to do what? a. Grow b. Lengthen c. Contract d. Go through mitosis e. All of the above Ans: D Difficulty: easy Feedback: 10.2 12. The sequence that muscle action potentials must go through to excite a muscle cell a. Sarcolemma, axon of neuron, T tubules b. T tubules, sarcolemma, myofilament c. Muscle fiber, axon of neuron, myofibrils d. Axon of neuron, sarcolemma, T tubules e. Myofibrils, myofilaments, mitochondria Ans: D Difficulty: medium Feedback: 10.2 13. The mitochondria in muscle fiber are arranged a. Randomly b. In circles c. Around the nuclei d. In rows e. Closest to the sarcolemma Ans: E Difficulty: easy Feedback: 10.2