Term
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Definition
-surrounded by fibrous epimysium
-connective tissue called perimysium diveides the ,uscle into fascicles
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Term
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Definition
-have plasma membranes called sarcolemma
-multinicleated
are striated
1. i bands- light bands
2. a bands-dark bands |
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Term
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Definition
| site where motor neurins stimulate a muscles fiber |
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Term
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Definition
| -area of muscles fiber sarcolemma. a motor neurn stimulates this |
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Term
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Definition
-densly packed myobibrils that run the length of the muscle
-has both thick and thin |
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Term
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Definition
-contain only thin filament (light bands)
-do shorten
-z lines found here |
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Term
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Definition
contain thick with some thin
-do no shorten
-m lines found here
-h bands are found in the center with thin filament overlap |
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Term
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Definition
| -area from one z line to the next |
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Term
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Definition
| protein that anchors in the thick filaments and allows elastic recoil |
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Term
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Definition
| -composed of protein myosin |
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Term
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Definition
| -composed of protein actin |
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Term
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Definition
sliding is produced by this between myosin and actin
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Term
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Definition
physically blocks cross bridges
troponin i- inhibits binding
troponin T- binds tropomyosin
troponin C- binds to calcium |
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Term
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Definition
| when a muscle quickly contracts and relaxes after elecrtic shock |
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Term
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Definition
-AKA-aerobic capacity
-determines by persons age, sex, size and athletic training |
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Term
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Definition
-AKA-anaerobic threshold
-another way to determine excercise intensity for someone |
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Term
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Definition
| breathing rate continues to be elevated after excercise |
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Term
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Definition
| -type 2 muscle fibers become thicker due to increased amount of actin and myosin |
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Term
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Definition
| -skeltal muscle has stem cells that fuse to the damaged muscle |
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Term
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Definition
-cell bodies in ventral horn of spinal cord
influenced by
-sensory feedback
-stimulation of inhibition from higher motor neurons from brain |
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Term
| two types of motor neurons are... |
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Definition
1. alpha- innervate extrafusal (contracting) muscles
2. Gamma- innervate intrafusal (stretch) muscles
-stimulated by upper motor neruons |
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Term
| Monosynaptic stretch reflex |
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Definition
-simplest reflex
-involves sensory neuron synapsing on a motor neuron
-strike the platellar tendon |
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Term
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Definition
-involuntary
-straited
-short, branched and connected by interculated discs |
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Term
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Definition
-mass of cardiac muscle cells
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Term
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Definition
-in blood vessls, bronchioles, digestive organs, urinary and reproductive tract
-allows contraction even when stretched |
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Term
| single unit smooth muscle |
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Definition
| - multiple gap junctions that make neighboring cells behave as a unit |
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Term
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Definition
- require individual nerve innervation
-few or no gap junctions
ex) arrecto pili and ciliary muscles |
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