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Nervous Tissue

Overview of the Nervous System

Central Nervous System Consists of the brain and spinal cord, which are enclosed and protected by the cranium and vertebral column.
Peripheral Nervous System Consists of all the rest; it is composed of nerves and ganglia.
Nerve A bundle of nerve fibers (axons) wrapped in fibrous connective tissue.
Ganglion A knot-like swelling in a nerve where neurone cell bodies are concentrated.
What are the three fundamental physiological properties that enable neurons to communicate with other cells ? 1) excitability, 2) conductivity, and 3) secretion
Excitability (irritability) Respond to environment changes called stimuli.
Conductivity Neurons respond to stimuli by producing electrical signals.
Secretion When electrical signal reaches end of nerve fiber, a chemical neurotransmitter is secreted that crosses the gap and stimulates the next cell.
Created by: 575170124



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