the nervous system

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

biologia przedmioty ścisłe układ nerwowy układ nervous system

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