Chapter 11: Physiology of the Muscular System
Test Bank
TRUE/FALSE
1. Myofibrils contain several sarcomeres lined up end to end.
ANS: T DIF: Application REF: Page 340 | Page 342
TOP: Overview of Muscle Cells
2. Another name for muscle cells is muscle fibers.
ANS: T DIF: Memorization REF: Page 340
TOP: Overview of Muscle Cells
3. Muscle cells have one nucleus and one mitochondrion.
ANS: F DIF: Synthesis REF: Page 340
TOP: Overview of Muscle Cells
4. Muscle fibers of skeletal muscle contain several nuclei.
ANS: T DIF: Memorization REF: Page 340
TOP: Overview of Muscle Cells
5. A triad consists of a T-tubule sandwiched between sacs of the sarcoplasmic reticulum.
ANS: T DIF: Memorization REF: Page 342
TOP: Overview of Muscle Cells
6. The following are characteristics that allow muscles to function as they do: excitability, contractility, extensibility, and regulation.
ANS: F DIF: Application REF: Page 340
TOP: Functions of Skeletal Muscle Tissue
7. The cell membrane of a muscle fiber is called the sarcoplasmic reticulum.
ANS: F DIF: Application REF: Page 340
TOP: Overview of Muscle Cells
8. The protein molecule that has heads jutting out for cross-bridging is myosin.
ANS: T DIF: Application REF: Page 344 TOP: Myofilaments
9. A neuromuscular junction is a type of connection called a synapse.
ANS: T DIF: Memorization REF: Page 345
TOP: Excitation of the Sarcolemma
10. The sliding filament theory is the current model of muscle contraction.
ANS: T DIF: Application REF: Page 346 TOP: Contraction
11. Muscle fibers use creatine phosphate to restore their ATP population.
ANS: T DIF: Application REF: Page 348 TOP: ATP
12. ATP is made up of adenine, ribose sugar, and three phosphate groups.
ANS: T DIF: Memorization REF: Page 348
TOP: ATP
13. Hemoglobin carries oxygen in the red blood cell, and myoglobin stores oxygen in the muscle fiber.
ANS: T DIF: Application REF: Page 349
TOP: Glucose and Oxygen
14. Anaerobic respiration is the first choice of the muscle cell for the production of ATP.
ANS: F DIF: Synthesis REF: Page 349 | Page 351
TOP: Energy Sources for Muscle Contraction
15. T-tubules are perpendicular to muscle fibers.
ANS: T DIF: Synthesis REF: Page 340 | Page 341 (Table 11-2)
TOP: Overview of Muscle Cells
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