Science LT 1 Nervous System

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20 Terms

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Function of the Nervous system

coordinates all the activities of the body

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Receive information about our surroundings from sense organs also known as ____________ by way of ___________.

receptors, sensory nerves

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The information perceived is processed in ___________ and ____________.

brain, spinal cord

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The human react to that information through a command from the brain or spinal cord by way of ___________ to the ____________.

motor nerves, effectors

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Major divisions of the Nervous System

Central Nervous System (CNS) and Peripheral Nervous System (PNS)

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Central Nervous System (CNS)

main processing center of the entire nervous system

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parts of the central nervous system

brain and spinal cord

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Main parts of the brain

cerebrum, cerebellum, brain stem

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Cerebrum

controls our activity, thought, 5 senses and seat of consciousness and control of all voluntary actions

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Cerebellum

controls balance and coordination, located at bottom of cerebrum

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Brain Stem

Connects the brain and spinal cord, controls automatic functions

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Spinal Cord

serves as the channel for signals between the brain and the rest of the body, controls simple musculoskeletal reflexes without input from the brain

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Peripheral Nervous System (PNS)

connects the CNS to the limbs and organs, contains all the nerves outside of the CNS

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Main Divisions of PNS

somatic and autonomic nervous system

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somatic nervous system

voluntary control of the body, functions we are aware of and can consciously influence

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parts of the somatic nervous system

spinal nerves and cranial nerves

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spinal nerves

nerve fibers carry motor and sensory signals between the spinal cord and the body

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cranial nerves

carry information into and out of the brain

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autonomic nervous system

control system that acts largely unconsciously

and regulates bodily functions, involuntary control.

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subdivisions of autonomic nervous system

sympathetic nervous system and parasympathetic nervous system