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24 Cards in this Set
- Front
- Back
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Locomotion
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-Active travel from place to place
-Energy overcomes gravity |
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Bicepts
Tricepts |
Move arm up
Move arm down |
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Hydrostatic Skeletons
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-Fluid held under pressure
-Found in worms (water balloon) |
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Skeletons provide
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-Body support
-Movement by working with muscles -protection of internal organs |
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Exoskeletons
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-Hard external cases
(Spider) |
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Endoskeletons
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Internal skeleton
(Human) |
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Axial
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-Skull
-Vertibrae -Ribs |
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Appendicular
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-Shoulder and pelvic
-Arms and legs |
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Caralige
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At the end of bones
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Bone Cells live
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(flexible protein fibers & hard calcium salts)
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Bone cells kept alive by
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-Blood vessels
-Hormones -Nerves |
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Long bones have
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-Fat-storing central cavity
-Bone marrow -Sponge at ends of bones |
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Bone cells
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-Repair bones
-Reshape bones throughout |
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Broken Bones
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-Are realigned and immobilized
-Bone cells build new bone, healing and breaking |
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Osteoposis
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Bone Disease
-weak bones Less likely -High calcium in diet -Regular excersize -No smoking |
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Muscles can only
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Contract
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Antagonistic
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Reverse actions
Re-lengthen muscles |
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Muscle fibers
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-Cells
-Bundles of myofibrils |
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Sarcomers
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Groups of thick and think filiments
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Motor neurons
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-Carry action potentials
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Axon of a motor neuron
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-Forms synapses with a muscle
-At a neuromuscular junction |
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Acetylcholine
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Is released from synaptic terminal
-Diffuses to the plasma membrane of the muscle fiber |
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motor unit consitst of
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A neuron
-controls muscle fibers |
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Muscle fibers can be classified as
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-Slow fibers
-Intermediate fibers -Fast fibers |
