Chapter 4 Unit One Psychology

The portion of nervous system consisting of the brain and spinal cord.

A collection of neurons and supportive tissue running form the base of the brain down the center of the back protected by a column of bones (the spinal column).

All portions of nervous systems outside the brain and spinal cord; it includes sensory and motor nerves.

The subdivision of the peripheral nervous system that connects sensory receptors and to skeletal muscles; sometimes called the skeletal nervous system.

The subdivision of the peripheral nervous system that regulates the internal organs and glands.

The subdivision of the autonomic nervous system that operates during relaxed states and that conserves energy.

The subdivision of the autonomic nervous system that operates during relaxed states and that conserves energy.

A cell that conducts electrochemical signals; the basic unit of the nervous system; also called a nerve cell.

Cells that support, nurture, and insulate neurons, remove debris when neurons die, enhance the formation and maintenance of neural connections, and modify neuronal functioning.

A neuron’s branches that receive information from other neurons and transmit it toward the cell body.

The part of the neuron that keeps it alive and determines whether it will fire.

A neuron’s extending fiber that conducts impulses away from the cell body and transmits them to others neurons.

A fatty insulation that may surround the axon of a neuron.

A bundle of nerve fibers (axons and sometimes dendrites) in the peripheral nervous system.

The production of new neurons form immature stem cells.