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Two major anatomical divisions are: começar a aprender		the central nervous system (CNS) and peripheral nervous system (PNS).
CNS consists of começar a aprender		the brain and the spinal cord.
PNS consists of começar a aprender		nerves that carry sensory messages to the CNS and motor commands from the CNS to the muscles and glands.
Two types of cells are: começar a aprender		neurons and neuroglia.
Neurons funtions are to: começar a aprender		transmit nerve impulses between parts of the nervous system.
Neuroglia functions are to: começar a aprender		support and nourish neurons, maintain homeostasis, form myelin and may aid in signal transmission.
Neurons consist of: começar a aprender		a cell body, dendrites and an axon.
The cell body contains começar a aprender		the nucleus and other organelle.
Dendrites are começar a aprender		extensions leading toward the cell body that receive signals from other neurons.
An axon function is to: começar a aprender		conducts nerve impulses away from the cell body toward other neurons or effectors.
Different sorts of neurons are: começar a aprender		sensory neurons, interneurons and motor neurons.
A sensory neuron function is to: começar a aprender		take messages to the CNS.
A sensory neuron may be equipped with: começar a aprender		endings called sensory receptors that detect changes in the environment.
An interneuron lies começar a aprender		within the CNS.
An interneuron function is to: começar a aprender		receive input from sensory neurons and from other interneurons. Sum up all the messages received from sensory neurons before communicate with motor neurons.
A motor neuron function is to: começar a aprender		take messages away from the CNS to an effector.

the nervous system

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