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  1. MET
  2. Myosin
  3. Myofibrillar Hypertrophy
  4. Anaerobic Threshold
  5. Metabolic Testing
  6. Actin
  7. Counter-Regulatory Hormone
  8. Sarcolemma
  9. Sarcoplasm
  10. Sarcoplasmic Hypertrophy
  11. Z-Discs
  12. Transverse (T)-Tubules
  13. Muscle Hypertrophy
  14. Sympathetic Nervous System
  15. Myofibrils
  16. Sarcomere
  17. Cross-Bridges
  18. Oxygen Deficit
  19. Capillarization
  20. Steady-State
  21. Oxygen Debt
  22. EPOC
  23. Sarcoplasmic Reticulum
  1. a Difference between oxygen uptake of the body during early exercise and during steady state exercise.
  2. b Tests that measure metabolic functions (e.g., digestion and energy production). Measures oxygen consumption during an activity.
  3. c Increase in the volume of the sarcoplasmic fluid in the muscle cell with no concurrent increase in strength.
  4. d A division of the autonomic nervous system that is always active and provides sympathetic tone; its activity increases during times of bodily stress.
  5. e Thick fibrous muscle protein that can split ATP and bind with actin.
  6. f Development of a capillary network.
  7. g Increase in the size of muscle cells.
  8. h Inward-folded crevice of the sarcolemma on muscle that forms tubular portions; T-tubule depolarization triggers calcium release and muscle contraction. Allows nerve impulses to travel along the sarcolemma.
  9. i Increased rate of oxygen uptake following strenuous activity.
  10. j Region of the sarcomere into which actin is inserted.
  11. k Repeating structural units of striated muscle fibers. The segment of myofibril between two successive Z lines.
  12. l Extra oxygen required above basal needs after a period of intense exercise.
  13. m Thin fibrous muscle protein that is necessary for cell shape and can bind to myosin.
  14. n One of the threadlike components of a muscle fiber. Consist of thick and thin filaments called myosin and actin. Bundles of which form muscle cells.
  15. o Hormone that opposes that action of insulin.
  16. p Forms when the head of myosin temporarily attaches to actin.
  17. q Plasma membrane of a muscle fiber.
  18. r Cytoplasm of muscle fibers.
  19. s A level of metabolism during exercise when oxygen consumption matches energy expenditure.
  20. t Oxygen cost of energy expenditure measured at rest, equal to 3.5 mL of oxygen per kilogram of bodyweight per minute.
  21. u The point at which lactate begins to accumulate in the bloodstream.
  22. v Enlargement of a muscle fiber as it gains myofibrils.
  23. w Endoplasmic reticulum of muscle that appropriates calcium.