Involved in preparing the body for behavior, particularly in response to stress, by activating the organs and the glands in the endocrine system. "fight or flight"

A layer of fatty tissue segmentally encasing the fibers of many neurons; enables vastly greater transmission speed of neural impulses as the impulse hops from one node to the next.

tends to calm the body by slowing the heart and breathing and by allowing the body to recover from the activities that the sympathetic system causes "rest and digest" (part of ANS)

A long bundle of neurons that carries messages between the body and the brain and is responsible for very fast, lifesaving reflexes

what system consists of the brain and spinal cord

a nerve cell in the nervous sytem

A division of the nervous system consisting of all nerves that are not part of the brain or spinal cord.

The occipital lobes contain the visual cortex, where visual signals are processed.

Myelin not only insulates the neuron, it also slows down the neural message helping with transmission of messages traveling down the axon.

its stable, negative charge when the cell is inactive (-70mV)

microscopic fluid-filled space between the axon terminal of one cell and the dendrites or surface of the next cell

transmit signals to the dendrites