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Chapter 3 critical thinking questions
4.)
The phrases in quotations indicate the process of apoptosis. This process eliminates cell that's are damaged, unneeded, excessive, or aged. In response to damaged macromolecules with a cell or to an extracellular signal, a series of intracellular enzymes, called capsases, are activated. They destroy the cells DNA, cytoskeleton, etc. producing a quick, neat death. The apoptotic cell shrinks without leaking its contents into surrounding tissue, detaches from other cells, groups together, and is instantly phagocytized by nearby cells.
5.)
The cellular organelle responsible for breaking down toxins such as phenol, formaldehyde, and alcohol is the peroxisomes.