Psychology

is the study of how biological processes relate to behavior and mental processes.

is a nerve cell

• sends, receives and integrates information throughout the body
• the basic unit of communication
• it is a tiny, information processing system with thousands of connections

• are the “glue” that holds neurons in place and supports them
• 90% of our brain cells are glial cells. They clean up and insulate neurons so we don’t scramble our communications.

receives all incoming information from other neurons

• the cell’s life support center
• contains everything that keeps the cell going.

several feet long, which is why it might take a second or two for you to feel pain

• a fatty tissue that helps the message travel quickly
• on the axon

they release neurotransmitters

tiny gap between each neuron

dentrite - cell body - axon - terminal buttons - synapse - next neuron

• when neuron is at rest
• negative charge inside the axon

• shifts in neurons electrical charge
• positive chargers rush in

• 1. All or None Law
• 2. All neural impulses are the same size
• 3. Self Propagating

sends the message

Receives the message

• chemical that is released from the terminal button of the presynaptic neuron and carries the message across the synapse to the postsynaptic neuron
• neurotransmitter binds to a receptor site on the dendrite of a postsynaptic neuron

reaction occuring when the neurotransmitters reach the postsynaptic neuron

positive voltage keeps message going

negative voltage shift that stops message from continuing

• 1. drifts away and is deactivated
• 2. or it is reabsorbed by the presynaptic neuron in a process called reuptake

cell can’t be activated for 1 -2 miliseconds after action potentional occurred