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Vet 116-Muscular Sys
| Question | Answer |
|---|---|
| Three major muscle groups | Skeletal, cardiac and smooth muscle |
| Skeletal muscle functions to make the animal __________. | Mobile |
| Cardiac muscle is only found in the _____________. | Heart |
| Smooth muscle is found in association with the ___________. | Organ systems |
| Myo-refers to _______________. | Muscle in general |
| Sarco-refers to _____________. | Muscle cells |
| Striated comes from the___________________. | Muscle cell's appearance |
| A muscle's thick, center portion | Muscle belly |
| Thick connective tissue attached to both ends to bones | Tendons |
| Some muscles are attached by broad sheets of fibrous connective tissue called ______________. | Aponeuroses |
| Most prominent aponeuroses | Linea alba |
| Attachment site that does not move much during contraction | Origin |
| Attachment site that moves a lot | Insertion |
| Muscles usually work in ________. | Groups |
| The muscle or muscle group that does the bulk of the work | Prime mover |
| Works opposite of the prime mover | Antagonist |
| Help prime mover | Synergists |
| Stabilize joint to allow other movement | Fixators |
| Skeletal muscle cells are extremely _______ and __________. | Long, thin |
| Skeletal muscle cells are called _______ rather than cells. | Fibers |
| Skeletal muscle cell membrane | Sarcolemma |
| Interior volume of the skeletal muscle cell is made up of almost entirely by tiny _____________. | Myofibrils |
| High number of ____________ present in sarcolemma. | Mitochondria |
| Instead of endoplasmic reticulum, the skeletal muscle cell has a specialized structure known as a _____________________. | Sarcoplasmic reticulum |
| Complex system of tubules that extend from the cell membrane | Transverse or T tubules |
| Two types of protein filaments | Actin, myosin |
| _______ is made up entirely of the myosin filaments and appears dark. | A band |
| ______ is formed by the thin actin filaments and is light. | I band |
| The dark lines running through the centers of the I bands and serve as attachment sites of the actin filaments | Z lines |
| The area from one Z line to the next | Sarcomere |
| When muscle looses its nerve supply, the muscle will begin to waste away and shrink in size called | Atrophy |
| The area where nerves join to muscle are called | Neuromuscular junctions |
| The space between the end of the nerve fiber and the sarcolemma of the muscle cell is called | Synaptic space |
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breanna127
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