Anatomy ch 11-15

Chemical transmitter substance released by some nerve endings

Enzyme present at the neuromuscular junction and synapses that degrades acetylcholine and terminates its action

carring to or toward a center

Direct method of cell division, characterized by a simple clevage of the nucleus without the formation of chromosomes

A type of CNS supproting cell; assists in exchanges between blood capillaries and neurons

of or pertaining to the ANS; under control of the ANS

Neuron process that carries impulses away from the nerve cell body; effernt process; the cinducting portion of a nerve cell

Branching neuron process that serves as a receptive, or input, region; transmits an electrical signal toward the cell body

Periphieral collection of cell bodies of first-order afferent neurons whose central axons enter the spinal cord

Carring away or away from, espically a nerve fiber that carries impulses away from the central nervous system

A type of CNS supporting cell; lines the central cavities of the brain and spinal cord

Collection of nerve cell bodies outside the CNS

Ability to be excited; a characteristic action or function by application of some stimilus

Protective coverings of the CNS; from the most external to the most internal, the dura mater, arachnoid mater, and the pia mater

A type of CNS supporting cell; can transform into phagocytes in ares of neural damage or inflammation

Fatty insulating sheath that surrounds all but the smallest nerve fibers

The delicate outermost membrane of the myeline sheath of a myelinated nerve cell

Nonexcitable cells of neural tissue that supports, protects, and insulates the neurons; glial cells

Small gaps in the myeline sheaths of medullated axons

A type of CNS supporting cell that composes myeline sheaths

Pertaining to that part of the ANS consisting of nerves and ganglia that arise from the cranial and sacral regions and function in opposition to the sympathetic system

Cell body

A type of supporting cell in the PNS; forms myeline sheathes and is vital to periphreal nerve fiber regeneration

Pertaining to that part of the ANS consisting of nerves that arise from the thoracic and lumbar regoins of the spinal cords, functioning in opposition to the Parasympathetic system as in stimulating heart beat.

Functional junction or point of close contact between two neurons or between a neuron and effector cell

Axons locking a myeline sheath and therefore conducting impluses quiet slowly

The time from the opening of the Na+ channels until the resting of the channels