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23 Cards in this Set
- Front
- Back
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What are some properties of muscles
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1. made of fibers
2. excitability 3. contractility 4. elasticity 5. extensibility |
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What do you call cells that replace or supplement damaged muscle cells by generating new muscle fibers through cell division
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satelite cells
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What surround each muscle fiber and what are they made of
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endomysium made of areolar CT
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What surrounds each fassicles and what are they made of
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perimysium and made of dense irregular CT
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Fassicles are grouped together and make up a muscle. What surrounds the muscle?
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epimysium made dense irregular CT
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What surrounds the epimysium of a muscle. What is it made of and what does it do
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deep fascia made dense irregular CT. Separates different muscles and organizes nerves, blood vessels and lymphatic vessels associated with the muscle
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At the end of a muscle, what happens
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muscles and CT layers merge to form a tendon (dense regular CT)
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Describe a muscle fiber with respect to nucleus subunits
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Its multinculeated and has many cylindrically shaped myofibrils
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What are myofibrils
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They are contractile elements and contain myofilaments that have myosin and actin
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What does the A band contain
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Includes the whole thick filament
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What does the I band contain
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Included only the thin filaments
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What does the H zone contain
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Part of the A Band that doesn't have thin filaments
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What bands shorten and which bands sta the same during conraction
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The A band doesn't shorten. (It can't because the A band length is measured by the length of the thick filament)
The H and I bands shorten |
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What do we call the site where neurons exert control over muscles
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neuromuscular junction
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One neuron can control more than one muscle fiber? T/F
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True
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What constitutes a motor unit
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a neuron and the muscle fiber it controls
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Describe cardiac muscle
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striated
involuntary Muscle fibers branched only one or two nuclei fatigue resistant |
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Where cardiac muscle fibers interconnected
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intercalated discs
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where do you find smooth muscle
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part of the wall of visceral organs
stomach intestine vasculature urinary bladder uterus |
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Describe smooth muscle
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Not striated
Involuntary one nucleus fusiform shape fatigue resistant |
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bacitracin
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inhibits bactoprenol recycling
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fosomycin
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blocks synthesis of n-acetyl muramic acid
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cycloserine
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alanine analog that inhibits incorporation of alanine into n-acetyl muramic acid
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