A 54-year-old male experienced an avulsion to his penis when his foreskin got caught in the zipper of his pants. He was able to unzip his pants and remove the foreskin prior to your arrival. Your assessment reveals that he is in severe pain and that the avulsion is bleeding moderately. The MOST appropriate treatment for this patient includes:
Select one:
A. requesting a paramedic to administer pain medication.
B. covering the avulsion with moist, sterile dressings.
C. administering 100% oxygen via a nonrebreathing mask.
D. applying direct pressure with a dry, sterile dressing.
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ATP binding leads to which of the following actions?
cross-bridge formation
pivoting of the myosin head
exposure of active sites on actin
detaching and resetting cross-bridges
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What happens immediately after the myosin head binds to the active site on actin?
ATP binds to the myosin head.
Tropomyosin moves away from the active site on actin.
The myosin head detaches from the active site on actin.
The myosin head pivots, moving the actin strand.
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Myosin molecules form cross-bridges when they attach to __________.
troponin
calcium
actin
tropomyosin
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