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What is the main function of the nervous system in animals?
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The nervous system coordinates the actions and sensory information by transmitting signals to and from different parts of the body.
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Name the two main parts of the nervous system in animals.
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The two main parts are the central nervous system (CNS) and the peripheral nervous system (PNS).
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What does the central nervous system consist of?
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The central nervous system consists of the brain and spinal cord.
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What role does the peripheral nervous system play in animals?
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The peripheral nervous system connects the central nervous system to the rest of the body and transmits information back and forth.
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How do neurons transmit signals in the nervous system?
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Neurons transmit signals through electrical impulses and chemical signals called neurotransmitters.
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What is the function of sensory neurons?
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Sensory neurons carry information from sensory receptors towards the central nervous system.
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What do motor neurons do in the animal nervous system?
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Motor neurons transmit commands from the central nervous system to muscles to carry out movements.
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Describe the role of the brain in the nervous system.
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The brain processes sensory information, coordinates bodily functions, and controls voluntary actions.
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How is the nervous system protected in animals?
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In many animals, the nervous system is protected by bones, such as the skull enclosing the brain and the vertebrae protecting the spinal cord.
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What is the importance of the spinal cord in the nervous system?
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The spinal cord transmits messages between the brain and the rest of the body and coordinates reflexes.
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How do reflex actions work in the nervous system?
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Reflex actions are rapid and involuntary responses to stimuli that occur without conscious thought, involving a direct pathway through the spinal cord.
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What is a synapse in the nervous system?
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A synapse is a junction between two neurons where information is transmitted from one neuron to another.
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What are neurotransmitters, and why are they important?
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Neurotransmitters are chemical messengers that transmit signals across a synapse, allowing communication between neurons.
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Explain the difference between voluntary and involuntary actions in the nervous system.
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Voluntary actions are controlled consciously by the brain, like moving a hand, while involuntary actions, like heartbeat, are automatic and not consciously controlled.
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What structures make up a neuron?
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A neuron consists of a cell body, dendrites, and an axon.
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