Components of the Nervous System

A nerve cell; the basic building block of the nervous system:
Dendrite
Neuron
Axon
A fatty tissue layer segmentally encasing the axons:
Glial cells
Nerves
Myelin sheath
A neuron's bushy, branching extensions that receive messages:
Dendrites
Axon
Glial cells
The neuron extension that passes messages through its branches to other neurons and glands:
Dendrite
Axon
Neuron
These support, nourish and protect neurons:
Endorphins
Glial cells
Nerves
Natural opiate-like neurotransmitters linked to pain control:
Endorphins
Endocrine
Morphine
A whitish fiber or bundle of fibers that transmits impulses of sensation to the brain or spinal cord:
Hormones
Adrenal
Nerves
A type of neuron that carries incoming information from receptors to brain and spinal cord:
Motor neurons
Sensory neurons
Interneurons
A type of neuron that carries outgoing information from brain and spinal cord to muscles:
Motor neurons
Sensory neurons
Interneurons
A type of neuron that lie within the brain and spinal cord, communicating internally:
Motor neurons
Sensory neurons
Interneurons
Chemical messendgers that cross the snaptic gaps between neurons, binding to receptor sites on receiving neurons:
Adrenal glands
Neurotransmitters
Interneurons
The slow chemical communication systems that secrete hormones into the bloodstream:
Endocrine
Endorphins
Ephilia
Chemical messengers manufactured by endocrine glands:
Endocrine
Hormones
Adrenal
The endocrine glands that sit above the kidneys and secrete hormones:
Pituitary
Glial
Adrenal
The endocrine gland that regulates growth and controls other glands under the influence of the hypothalamus:
Pituitary
Glial
Adrenal
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