the nervous system

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sākt mācīties

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

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