Principles of Biological Psychology

• Everything psychological is simultaneously biological
  Biology is the root of psychology. For certain behavior to occur, certain biological act must occur.

• The nervous system is complexity build from simplicity.
  The whole nervous system is built from neurons, a simple building block. The neuron’s task is simple. It can only fire the message through its axon to another neuron or not firing the message. Many neurons made up the subsystems, which made up the whole complex nervous system of the body.

• The brain is both specialized and integrated.
  The brain is composed of several parts. Each part of the brain is specialized with its own unique task of controlling the system. All the specialized parts also work as a team to function the body.

• The nervous system is “plastic” especially at early ages of development.
  New born babies have much more neurons than grown up individuals. Babies’ nervous system is plastic, flexible for changes. As the baby grows up, the brain will get rid of the unused neurons. For example, new born babies have the ability to make all the sounds possible for human. When the baby grew in certain language environment, the baby’s brain will keep the sound needed for that language and get rid of the sounds that are not used in the language.