Addictive drugs stimulate a brain region called the nucleus accumbens, which results in intensified feelings of pleasure due to the release of which neurotransmitter?

What is the major difference between primary circular reactions and secondary circular reactions in Piaget's sensorimotor stage?

a) an infant must first demonstrate the primary circular reactions before demonstrating the secondary circular reactions b) primary circular reactions are based upon enjoyment activities, while secondary circular reactions are not c) primary circular reactions bring about a desirable consequence, while secondary circular reactions do not d) primary circular reactions involve activities where the infant is focused on its own body, while secondary circular reactions involve activities where the infant's actions relate to the outside world

Long-term, continuous exposure to stressors can increase people's susceptibility to disease

Indicate whether the statement is true or false.