Under almost all circumstances, brain cells can only use carbohydrates for energy. under almost all circumstances, brain cells can only use carbohydrates for energy.
a. true
b. false

the answer is a) a shiprock was formed by igneous process

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.