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17 Cards in this Set
- Front
- Back
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Nervous System Purpose
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To receive, process and transmit signals throughout your body
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Two major parts of the nervous system
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1. Peripheral nervous system (PNS)
2. Central nervous system (CNS) |
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What makes up the Peripheral nervous system?
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Nerves and supporting cells (receive, transmit)
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What makes up the central nervous system?
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brain and spinal cord (process)
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What is the nervous system made up of? What do they do?
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Made up of neurons (nervous cell)
Receive, process, and transmit impulses (messages) |
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Three types of neurons and their functions?
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Sensory (receive)
Interneuron (process) Motor (transmit) |
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Parts of a Neuron
Dendrites |
Receive
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Parts of a Neuron
Cell Body |
Process
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Parts of a Neuron
Axon Myelin Sheath |
Transmits
Wrapped in myelin sheath which insulates the axon to increase impulse speed |
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Two major parts of the CNS and what they consist of?
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Brain
Cerebrum, Cerebellum, Brain Stem Spinal Cord |
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Cerebrum
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Controls voluntary activities, intelligence, learning and judgement
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Cerebellum
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Controls coordination, movement and balance
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Brain Stem
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Controls involuntary activities such as heart rate, blood pressure, and breathing
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What does the spinal cord do?
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Connector between the brain and the rest of the body
Processes reflexes |
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Two major divisions of the PNS and what they do?
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Sensory: receives input from sensory organs and transmits to CNS
Motor: Receives output from CNS and transmits to muscles or glands |
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PNS
Motor Two major systems |
Somatic: voluntary movements, reflexes
Autonomic: involuntary movements or secretions |
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PNS
Motor Autonomic Two divisions |
Parasympathetic: "rest and digest", increase blood circulation to digestive system
Sympathetic: "fight or flight", increase blood circulation to the arm/leg muscles |
