Anatomy Chapter 6

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Across
  1. 3. A single rapid contraction of a muscle followed by relaxation.
  2. 7. Muscle consisting of spindle-shaped, unstriped muscle cells; Involuntary muscle.
  3. 9. The plasma membrane of a muscle fiber.
  4. 14. The ability of muscle fibers to stretch.
  5. 17. The thin connective tissue surrounding each muscle cell.
  6. 18. A reduction in size or wasting away of an organ or cell resulting from disease or lack of use.
  7. 21. The sheath of fibrous connective tissue surrounding a muscle.
  8. 22. Fibrous or membranous sheet connecting a muscle and the part it moves.
  9. 23. Contractile organelles found in the cytoplasm of muscle cells.
  10. 25. Chemical released by neurons that may, upon binding to receptors of neurons or effector cells, stimulate or inhibit them.
Down
  1. 1. A motor neuron and all the muscle cells it supplies.
  2. 2. The connective tissue enveloping bundles of muscle fibers.
  3. 4. The ability to forcibly shorten when adequately stimulated.
  4. 5. Inability of a muscle to contract even while being stimulated.
  5. 6. The ability of muscle fibers to recoil and resume their resting length after being stretched.
  6. 8. An electrical event occurring when a stimulus of sufficient intensity is applied to a neuron or muscle cell, allowing sodium ions to move into the cell and reverse the polarity.
  7. 10. One of multiple ends of the axon that branches from the motor neuron axon; Interacts with the sarcolemma of different muscle cells to form neuromuscular junctions.
  8. 11. Specialized muscle of the heart with striations and intercalated discs; Involuntary muscle.
  9. 12. Filaments composing the myofibrils; Of two types: actin and myosin.
  10. 13. A response that varies directly with the strength of the stimulus.
  11. 15. Neuron process that carries impulses away from the nerve cell body; Efferent process; The conducting portion of a nerve cell.
  12. 16. One of the principal contractile proteins found in muscle; Makes up the thick filaments.
  13. 19. A bundle of nerve or muscle fibers bound together by connective tissue.
  14. 20. Muscle cells
  15. 24. One of the principal contractile proteins found in muscle; Makes up the thin filaments.