What is rigor mortis?
What will be an ideal response?
The need for ATP in separating myosin and actin is amply shown in rigor mortis. This "stiffness of death" is a generalized locking in place of the skeletal muscles that begins 3 to 4 hours after death and completes in about 12 hours. Following death, the cytosolic concentration of Ca2+ begins to rise, most likely because the inactive muscle cell membrane cannot keep out extracellular Ca2+ and perhaps because Ca2+ leaks out of the lateral sacs. This Ca2+ moves troponin and tropomyosin aside, letting actin bind with the myosin cross bridges, which were already charged with ATP before death. Dead cells cannot produce any more ATP, so actin and myosin, once bound, cannot detach because they lack fresh ATP.
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Answer the following statement true (T) or false (F)
Which structure regulates the flow of material into the colon?
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Since animals cannot open vials, why are veterinary drugs dispensed in childproof containers?
What will be an ideal response?
What are the stages of skin regeneration after injury?
What will be an ideal response?