Which sequence correctly lists the changes that allow the thick and thin filaments to slide past one another in skeletal muscle contraction?
A. Attach - pivot - detach - return
B. Pivot - attach - detach - return
C. Pivot - attach - return - detach
D. Return - pivot - attach - detach
E. Attach - detach - pivot - return
Answer: A
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Wallerian degeneration involves the breakdown of
A. the segments of axon and myelin sheath between the site of damage and the peripheral effector. B. the segments of axon and myelin sheath between the site of damage and the cell body. C. the neurilemma both central and peripheral to the site of trauma. D. macrophages and microglia that have completed the job of CNS cleanup after trauma.
Label B represents the
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What is true about the blood supply to the skin?
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