Card Set Information
Ch 9 Topics 1-2 Skeletal Muscle Structure and Fibers
Layers of dense connective tissue that separate and hold skeletal muscles in position.
Fascia that surrounds or penetrates the muscles.
Fascia just beneath the skin.
Fascia of the serous membranes covering organs in various body cavities and lining those cavities.
Cordlike structure of dense connective tissue that attaches muscles to bone.
Sheet-like structure that attaches muscles to other muscles or to bone.
Layer of connective tissue that closely surrounds a skeletal muscle.
Layer of connective tissue that separates the muscle tissue into small sections containing bundles of skeletal muscle fibers called fascicles.
Layer of connective tissue that covers the muscle fibers within the fascicles.
List the 5 levels of structure of a muscle in order.
1) Muscle 2) Fascicles 3) Muscle Fibers (cells) 4) Myofibrils 5) Thick and Thin Filaments
Bundles of skeletal muscle fibers.
A single muscle cell.
Muscle cell membrane.
Cytoplasm of a muscle cell.
Threadlike structures that run parallel in the sarcoplasm; play a role in muscle contraction.
Composes thick protein filaments in myofibrils.
Composes thin protein filaments in myofibrils.
A repeating pattern of a myofibril.
Protein molecule that has three protein subunits and is attached to actin.
Protein molecule that is rod-shaped and occupies the longitudinal grooves of the actin helix.
A network of membranous channels within the sarcoplasm of a muscle fiber that surrounds each myofibril and runs parallel to it.
Membranous channels that extend into the sarcoplasm, continuous with the sarcolemma, and contain extracellular fluid.
Transverse Tubules (T-Tubules)
Enlarged portions of the sarcoplasmic reticulum, T-tubules lie between them.