What nutrient is a necessary component of the diet of pregnant women in order to prevent neural tube defects? \?

b - the respond is innate and varies over time.

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what statement best describes the difference between the sympathetic and parasympathetic nervous systems?

the sympathetic nervous system prepares the body for intense physical activity and is often referred to as the fight-or-flight response. the parasympathetic nervous system has almost the exact opposite effect and relaxes the body and inhibits or slows many high energy functions.