Name Date Section Reviewing Your Knowledge 12 A. Skeletal Muscle Structure Number the following nestled, cylindrical structures in order from largest (1) to smallest (5). ___ myofibril ___ muscle fiber ___ fascicle ___ muscle ___ filaments B. Skeletal Muscle Structural Terms Identify the structure that matches the description. 1. Connective tissue covering surrounding a fascicle 2. Finger-like invaginations of plasma membrane; extend into interior of fiber and surround myofibrils 3. Plasma membrane of skeletal muscle fiber 4. Connective tissue covering surrounding the muscle 5. Smallest contractile unit within individual muscle fibers 6. Stores calcium within muscle fiber 7. Connective tissue covering surrounding individual muscle fibers 8. Two terminal cisternae and a T tubule 9. Rod-like structures within skeletal muscle fiber that contain thin and thick filaments organized into sarcomeres
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The largest structure is the muscle. Step 2: Identify the next largest structure after the muscle. The next largest structure is the fascicle. Step 3: Identify the structure smaller than the fascicle. The structure smaller than the fascicle is the muscle Show more…
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Name Lab Time/Date Microscopic Anatomy and Organization of Skeletal Muscle Skeletal Muscle Cells and Their Organization into Muscles 1. Use the items in the key to correctly identify the structures described below. Key: 1. connective tissue covering a bundle of muscle cells 2. bundle of muscle cells 3. contractile unit of muscle 4. a muscle cell 5. thin areolar connective tissue surrounding each muscle cell 6. plasma membrane of the muscle fiber 7. a long filamentous organelle with a banded appearance found within muscle cells 8. actin- or myosin-containing structure 9. cord of collagen fibers that attaches a muscle to a bone 2. List three reasons why the connective tissue wrappings of skeletal muscle are important. 3. Why are there more indirect - that is, tendinous - muscle attachments to bone than there are direct attachments?
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