Remembering Project Chapter 8

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Across
  1. 2. Chemicals that are released when neurons communicate with the cells that they control at synapses
  2. 5. Near the region where the thick and thin filaments overlap each transverse tubule lies between two enlarged portions of the sarcoplasmic reticulum
  3. 6. Dense connective tissue that separates an individual skeletal muscle from adjacent muscles and holds it in position
  4. 10. The opposing ends of cardiac muscle cells are connected by this type of structure; these are elaborate junctions between cardiac muscle cell membranes
  5. 12. A muscle that opposes the action of another muscle; for the example of elbow flexion, triceps brachii is this certain muscle
  6. 17. Threadlike structures that that lie parallel to one another in the sarcoplasm and play a fundamental role in muscle contraction
  7. 19. The thick filaments composed of this protein is one of two kinds of protein filaments in the myofibril
  8. 21. Other layers of connective tissue that extend inward from the epimysium
  9. 22. A type of major smooth muscle where the muscle cells are separate rather than organized into sheets
  10. 24. It is a response to nervous stimulation that originates repeatedly from the spinal cord and stimulates only a few muscle fibers at a time
  11. 25. A small gap that separates the membrane of the neuron and the membrane of the muscle fiber
  12. 28. Synapse between a motor neuron and the muscle fiber that it controls
  13. 29. A muscle that is responsible for a specific movement; for the example of elbow flexion, biceps brachii is this certain muscle
  14. 30. Small sections of muscle tissue that are separated from the perimysium and are bundles of skeletal muscle fibers
Down
  1. 1. A protein that is synthesized in muscle cells and imparts the reddish-brown color of skeletal muscle tissue; it can combine loosely with oxygen just like hemoglobin
  2. 3. A set of membranous channels that extend inwards as invaginations from the fiber’s membrane and passes all the way through the fiber
  3. 4. An increase in the number of motor units being activated during a contraction
  4. 7. Broad fibrous sheets that connective tissue forms which may attach to bone, skin, or to the connective tissue of adjacent muscles
  5. 8. The contractile response of a single muscle fiber to a single impulse is called this; It consists of a period of contraction, during which pulling force increases, followed by a period of relaxation, during which the pulling force declines
  6. 9. The less movable end of the muscle; when a muscle contracts, its insertion is pulled toward this point on the muscle
  7. 11. Membrane within the sarcoplasm of a muscle fiber form this and correspond to the endoplasmic reticulum of other types of cells
  8. 13. A skeletal muscle fiber normally does not contract until this specific neurotransmitter stimulates it
  9. 14. A layer of connective tissue that closely surrounds each skeletal muscle and what the fascia blends with
  10. 15. A thin covering in which each muscle fiber within a fascicle lies within a layer of connective tissue
  11. 16. A repeating pattern of units cause the striations of skeletal muscle within each muscle fiber
  12. 18. A movement that decreases the angle between two body parts, occurring at a joint
  13. 20. A type of smooth muscle which is composed of sheets of spindle-shaped cells in close contact with one another; it is the common type of smooth muscle which is found in the walls of hollow organs
  14. 23. The functional connection between a neuron and another cell
  15. 26. The thin filaments composed of this protein is one of two kinds of protein filaments in the myofibril
  16. 27. The more movable end of the muscle; when a muscle contracts, this point on the muscle is pulled toward the muscle’s origin