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11 Cards in this Set
- Front
- Back
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Defn
1. Epimysium 2. Perimysium 3. Endomysium |
1. Surrounds muscles
2. Surrounds fascicles 3. Surrounds individual muscle fibers |
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What is the name of the membrane surrounding the skeletal muscle fibers?
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Sarcolemma
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What is a T-tubule?
What is a terminal cisternae? Together, these make... |
1. Inward extension of SR
2. Swollen areas of SR with calcium 3. Triad |
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Calcium binds to which: troponin or tropomyosin?
As such, which is moved to allow crossbridges because of calcium binding? |
1. Troponin
2. Tropomyosin |
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Thick and thin filaments are part of a group of filaments known as....
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Myofilaments
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What is the difference between an A band and an I band?
What are the Z disk, H zone, and M line? |
1. A bands are dark regions of striations where thick and thin overlap. I bands only have thin filaments, so are lighter
2. Z disk: Bisects I band (One Z disk to the next = sarcomere) H zone: Bisects A bands M line: Bisects H zone and has proteins for stabilizing and supporting filaments |
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What is excitation-contraction coupling?
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Relationship where muscle fiber is stimulated by motor neuron to create a contraction
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Which 3 muscles make up the erector spinae?
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Iliocostalis, longissimus, spinalis
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What are the muscles of facial expression?
What are the muscles of mastication? |
Orbicularis oculi, orbicularis oris, zygomaticus major/minor
Masseter and temporalis |
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What are Nissl bodies?
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They are compartmentalized RER in neurons
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What are oligodendrocytes?
Astrocytes? Microglial cells? Schwann cells? Satellite cells? Ependymal cells? |
1. Form myelin sheath in CNS
2. Anchor neurons to blood vessels, maintain extracellular environ., help form blood-brain barrier 3. Phagocytic cells of CNS 4. Form myelin sheathe in PNS 5. Surround cell bodies in PNS 6. Form and circulate CS fluid in CNS |
