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Two electrons (e1 and e2) and a proton (p) lie on a straight line, as shown. The directions of the force of e2 on e1, the force of p on e1, and the total force on e1, respectively, are:
Brainstem
The lower part of the brain that connects the cerebrum with the spinal cord and controls basic life functions such as breathing, heart rate, and blood pressure.
Growing Tumor
An abnormal mass of tissue that forms when cells grow and divide more than they should or do not die when they should.
Limbic System Structure
The complex system of nerves and networks in the brain, involving several areas near the edge of the cortex concerned with instinct and mood. It controls the basic emotions (fear, pleasure, anger) and drives (hunger, sex, dominance, care of offspring).
Aggression and Fear
Emotional and behavioral responses that can manifest as a result of threats to survival or wellbeing; aggression is often a response to fear or a perceived threat.
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