Components of the Nervous System

A nerve cell; the basic building block of the nervous system:

A fatty tissue layer segmentally encasing the axons:

A neuron's bushy, branching extensions that receive messages:

The neuron extension that passes messages through its branches to other neurons and glands:

These support, nourish and protect neurons:

Natural opiate-like neurotransmitters linked to pain control:

A whitish fiber or bundle of fibers that transmits impulses of sensation to the brain or spinal cord:

A type of neuron that carries incoming information from receptors to brain and spinal cord:

A type of neuron that carries outgoing information from brain and spinal cord to muscles:

A type of neuron that lie within the brain and spinal cord, communicating internally:

Chemical messendgers that cross the snaptic gaps between neurons, binding to receptor sites on receiving neurons:

The slow chemical communication systems that secrete hormones into the bloodstream:

Chemical messengers manufactured by endocrine glands:

The endocrine glands that sit above the kidneys and secrete hormones:

The endocrine gland that regulates growth and controls other glands under the influence of the hypothalamus: