MFTA-Q3B

1. Muscle fibers contain myofibrils composed of actin and myosin filaments. *

A. True B. False

2. What is the name of the cellular membrane of a muscle fiber (cell)? *

A. Epimysium B. Perimysium C. Endomysium D. Sarcolemma

3. What is the name of the contracting unit of a muscle fiber? *

A. Sarcoplasmic Reticulum B. Fascicle C. Sarcomere D. Myoglobin

4. What is the term that describes the repeated molecular movement that causes muscle contraction. *

A. Anaerobic Glycolysis B. Cross-Bridge Cycling C. Muscle Fasciculation D. Isotonic Contraction

5. What is the name of the non-oxygen dependent process to breakdown glucose for the production of adenosine triphosphate (ATP)? *

A. Cross-Bridge Cycling B. Aerobic Respiration C. Active Transport D. Anaerobic Glycolysis

6. What percent of the ATP that is required while at rest is provided by Aerobic Respiration? *

A. 95% B. 75% C. 55% D. 35%

7. What is the specific name for a muscle contraction during which the muscle elongates? *

Concentric Isometric Eccentric Isotonic

8. What is the name of the protein in muscle that stores a small amount of excess oxygen? *

A. Hemoglobin B. Cytoglobin C. Neuroglobin D. Myoglobin

9. What determines the number of muscle fibers in a given muscle? *

A. Exercise B. Genetics C. Environment D. Nutrition

10. What is the name of the condition in which the mass (size, bulk) of a muscle fiber decreases? *

A. Hypertrophy B. Sarcopenia C. Atrophy D. Kwashiorkor

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