Term
| Muscle Connective Tissue Investments |
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Definition
Epimysium: surrounds entire muscle
Perimysium: surrounds fascicles of muscle cells
Endomysium: surrounds individual muscle cells (reticular fibers + external lamina) |
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Term
| Red vs White muscle fibers |
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Definition
Red:
high in myglobin, mitochondria, oxidative enzymes
low in ATPase
White:
High in ATPase
use anaerobic glycolysis |
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Term
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Definition
intermediate filaments.
Desmin anchors Z disks to each other.
Vinculin anchors Z disks to sarcolemma |
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Term
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Definition
| formed by the sarcoplasmic reticulum at the A/I band junction |
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Term
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Definition
A = thick + thin
I = thin H = thick |
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Term
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Definition
| F-actin = G-actin polymers: bound by tropomyosin when relaxed and myosin during contraction |
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Term
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Definition
TnT = binds troponin to tropomyosin
TnC = Ca binding
TnI = actin binding (inhibit myosin bind) |
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Term
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Definition
| antiparalle myosin bundles with myomesin, titin, and C protein |
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Term
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Definition
Heavy = tail + head(w/ATPase)
Light = 2/head |
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Term
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Definition
| M line protein: cross link mysoins |
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Term
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Definition
| Anchors Z disk to thick filaments (myosin) |
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Term
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Definition
| DePol/Ca Release tavels down T tubules causing DHP opening = SR Ca release @ junctional feet. Ca binds troponin C = conf change and inhibition release + tropomyosin uncovers actin binding site. |
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Term
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Definition
| a neuron and all the muscle cells it innervates (contract in unison). |
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Term
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Definition
| sarcolemmal ivaginations lined by external lamina (that contains acetylcholinesterase) |
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Term
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Definition
| intrafusal fibers. stimulation (by strech or y-efferents) causes a-efferent firing = contract/shorten |
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Term
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Definition
| tension sensors: type Ib afferents inhibit a-efferents. |
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