When a squirrel hears a strange noise that might indicate the presence of a predator, fight-or-flight hormones are released into its system. The hormones help prepare the squirrel's body to do strenuous physical activities, like quickly climbing up a tree, more efficiently. Which statement describes how two organ systems work together to help a squirrel respond to a possible external threat?
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When a squirrel hears a strange noise that might indicate the presence of a predator, fight-or-fligh...
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