the nervous system

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

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biologia przedmioty ścisłe układ nerwowy układ nervous system

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