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Flash Cards
Number 1. a connective tissue covering the entire muscle
Correct Answer: Epimysium
Number 2. a connective tissue covering a group of muscle fibers
Correct Answer: Perimysium
Number 3. a connective tissue covering individual muscle fibers
Correct Answer: Endomysium
Number 4. another name for a group of muscle fibers
Correct Answer: Fascicle
Number 5. the cell membrane of a muscle fiber
Correct Answer: Sarcolemma
Number 6. a single muscle cell
Correct Answer: Fiber
Number 7. the contractile structures of the cells made up of repeating protein units called sarcomeres
Correct Answer: Myofibrils
Number 8. the filaments of myofibrils constructed from the proteins actin and myosin
Correct Answer: Myofilaments
Number 9. the functional contractile units of muscle fibers that are made up of thick (myosin) and thin (actin) filaments
Correct Answer: Sarcomeres
Number 10. thick filaments
Correct Answer: myosin
Number 11. thin filaments
Correct Answer: actin
Number 12. the area between the actin filaments
Correct Answer: H Zone
Number 13. a neurotransmitter stimulating muscle contractions
Correct Answer: acetylcholine
Number 14. sends a signal (action potential) to the muscle fibers
Correct Answer: neuron
Number 15. an organelle in the muscle
Correct Answer: sarcoplasmic reticulum
Number 16. binds and stores calcium in the sarcoplasmic reticulum
Correct Answer: Calsequestrin
Number 17. formed when two filaments bind together as part of the muscle shortening process during contraction
Correct Answer: cross bridge
Multiple Choice
Play this game as many times as needed to learn the structures of skeletal muscle and understanding of muscle contraction. Click image to see the full size.18. Which of these images illustrate a muscle contracted?
Answer: B
19. The ______ is made up of actin and myosin protein fibers and is the contractile unit of the muscle fiber.
Answer: sarcomere
20. Identify the structure labeled “C” in the image.
Answer: Sarcomere
21. Identify the structures involved in forming a cross bridge in the image.
Answer: A and B
22. What would happen if calcium was continuously released from the sarcoplasmic reticulum?
Answer: continuous skeletal contraction would occur
23. Identify structure “A” in the image.
Answer: Perimysium
24. Identify structure “C” in the image.
Answer: Bone
25. What part of the skeletal muscle structure organization belongs in the “A” box in the image?
Answer: Fascicle
26. What part of the skeletal muscle structure organization belongs in the “B” box in the image?
Answer: Sarcomere
27. The contractile structures of the cells made up of repeating protein units called sarcomeres.
Answer: Myofibrils
