作者:Heather Carter 10 年以前
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weightlifting
no movement occurs
pushing against concrete wall
movement occurs
normal exercise
produces 36 molecules of ATP
Shortcoming: requires continuous supply of oxygen and fuels
makes body more flexible and resistant to fatigue
produces 2 molecules of glucose
Shortcoming: uses a lot of glucose and produces little ATP
increases strength
muscle never completely returns to a relaxed state
effects are compounded
a. speed or b. number of cells stimulated
3. Movement/action it causes
4. Number of origins
5. Location of origin and insertion
6. shape
7. Direction of muscle fibers
3. All have at least 2 attachments: origin & insertion
4. Muscles can only pull, they never push
5. During contraction, the insertion moves towards origin
stabilizes joints
generates heat
not striated, 1 nucleus
striated, 1 nucleus
involuntary, regulated by ANS
striated, multinucleated
voluntary, regulated by CNS