Term
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Definition
attached to bones and skin
striated
voluntary |
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Term
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Definition
only in heart
striated
involuntary |
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Term
|
Definition
walls of hollow organs: stomach, urinary bladder, airways
not striated
involuntary |
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Term
|
Definition
| ability to receive and respond to stimuli |
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Term
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Definition
| ability to shorten when stimulated |
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Term
|
Definition
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Term
|
Definition
| ability to recoil to resting length |
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Term
| skeletal muscle exists as a discrete organ contains |
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Definition
| muscle fibers, connective tissue, blood vessels (1 artery, 1 or more veins), lymph vessels, nerve fibers (1 nerve) |
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Term
|
Definition
| surrounds the entire muscle/organ |
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Term
|
Definition
| surrounds bundles of muscle cells (fascicles) |
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Term
|
Definition
| surrounds individual muscle cells (fibers) |
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Term
|
Definition
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Term
|
Definition
cylindrical cell up to 30 cm long.
multiple peripheral nuclei
many mitochondria
myofibril |
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Term
|
Definition
| densely packed, rod-like elements (contractile/elastic units) |
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Term
|
Definition
functional units of myofibril.
composed of actin and mysoin filaments that interact to contract sacromeres.
(basic functional unit of muscle) |
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Term
| activation of skeletal muscles |
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Definition
| activated by nerve impulses from brain and spinal cord. motor impulses |
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Term
|
Definition
| travel away from CNS. these neurons are motor neurons. (sensory impulses travel towards CNS) |
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Term
| where neuron contacts the muscle cell |
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Definition
axon branches.
activates from a few to hundreds of muscle fibers |
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Term
|
Definition
| single motor neuron and all muscle fibers it stimulates |
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Term
| origin or muscle attachment |
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Definition
| attachment of a muscle to the immovable or less movable bone. in the limbs, the origin is usually proximal to the insertion. |
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Term
| insertion of muscle attachment |
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Definition
| attachment of a muscle to the movable bone |
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Term
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Definition
| movement that the contraction of a muscle causes. |
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