26138310
Description
Flashcards by Diamond Sapphire, updated more than 1 year ago
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Created by Diamond Sapphire
about 5 years ago
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| Question | Answer |
| What type of muscle is this? | Skeletal muscle |
| What type of muscle is this? | Cardiac muscle |
| What type of muscle is this? | Smooth muscle |
| The alternating dark and light bands represent what functional unit of skeletal muscles? | Sarcomeres |
| What connective tissue surrounds a group of muscle cells to form a fascicle. | Perimysium |
| dense connective tissue that surrounds the entire muscle | Epimysium |
| thin layer of connective tissue that surrounds each muscle cell. | Endomysium |
| Within the sarcomere, the main dark band is which band? | The A band |
| Within the sarcomere, the main light bad is which band? | The I band |
| Within the sarcomere, the light band in the middle of the A band is what? | The H zone |
| Within the sarcomere, the dark band in the middle of the H zone is what? | The M band |
| Within the sarcomere, what is the dark line that runs through the I band? | The Z line |
| A single sarcomere runs from.... | Z line to Z line |
| During contraction, the I band ___, the Z lines move ___, and the A band ___ | Narrows; closer together; remains relatively unchanged |
| What are T-tubules? | Small, tubular invaginations of the muscle cell membrane deep into the cells that intertwine among the myofibrils |
| What is a triad? Where are they found? | Intersection of 2 terminal cisternae lie alongside to each T-tubule Found in skeletal muscles |
| specialized junctions that connect the individual cells within cardiac muscles | Intercalated disk |
| What are the 3 types of cell junctions present within intercalated disks? | Desmosomes, fascia adherens, and gap junctions |
| Adjacent cells have a lot of ___ to communicate to each other | Gap junctions |
| Smooth muscles have a rudimentary SR but have no ___ | T-tubules (and no striations) |
| In smooth muscle, the nucleus is generally ___ located | Centrally |
| Skeletal muscle fiber is multinucleated with the nuclei ___ located | Peripherally |
| Cardiac muscle has a single nucleus that is ___ located | Centrally |
| Skeletal muscles are not capable of regeneration on their own and require the help of which cells? | Satellite cells |
| T/F Cardiac muscles are capable of regeneration | False |
| T/F Smooth muscles are capable of regeneration | True |
| Sarcolemma | muscle cell membrane |
| Sarcoplasm | Cytoplasm of muscle cell |
| Sarcoplasmic reticulum | Smooth endoplasmic reticulum |
| Sarcosomes | Mitochondria of muscle cell |
| Muscle “fibers” | muscle cells or MYOCYTES |
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