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29 Cards in this Set
- Front
- Back
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Parts of the Nervous System |
Brain
Spinal Chord Peripheral Nerves |
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Nerve Cell |
Neuron |
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Synapse |
Area between neurons |
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General Functions of the Nervous System |
1. Signals movement of body parts
2. Triggers secretions from glands 3. Maintain state of consciousness 4. Gathers information (internal and external) 5. Stimulates thirst, hunger,fear, rage, and sexual behaviors |
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The Acting Systems |
Central nervous system (CNS) Peripheral nervous system (PNS) |
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CNS Parts and Functions |
Brain and Spinal Cord,
Processes information Sends and receives information |
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PNS Function |
Peripheral nerves, responsible for getting information to and from the CNS
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Peripheral Nerves |
Cranial and spinal nerves that are contacting body structures
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Systems of PNS |
Autonomic Somatic |
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Somatic System |
Transmits information from environment to CNS
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Parts of Autonomic System |
Sympathetic Parasympathetic |
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Sympathetic System |
Prepares the body for action, "Fight or Flight" Regulates Circulation Through all thoracic and 1st and 2nd lumbar vertebrae |
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Parasympathetic System |
Cranial nerves
Sacral spinal nerves Opposite to the sympathetic system |
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Sympathetic Stimulates |
Circulatory system
Respiratory system Skeletal and muscular systems Vision, sweating, metabolism Mental awareness |
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Parasympathetic Stimulates |
Digestion
Increased salivation Increases tone and contraction of intestinal smooth muscle Contraction of bladder wall muscle |
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Steps of the Nervous System |
1. Cells called neurons
2. They communicate with each other 3. Impulses from neuron to another 4. Eventually reaches the brain |
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Parts of the Neuron |
Axons - carry messages away Dendrites -receptors |
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Antagonist
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Prevents normal neurotransmitter from binding and thus blocks its effects
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Agonist
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Binds to receptor
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Types of Receptors |
Mechanoreceptors
Thermoreceptors Nociceptors Electromagnetic receptors Chemoreceptors |
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Types of Mechanoreceptors |
1. Tactile
2. Deep Tissue 3. Equilibrium 4. Arterial Pressure 5. Hearing |
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Types of Thermoreceptors |
Hot detecting Cold detecting |
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Nociceceptors |
Detect physical or chemical damage to a tissue
Always results in pain impulse |
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Electromagnetic Receptors |
Detect light Rods - B/W Cones - Color |
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Types of Chemoreceptors |
Taste
Smell Arterial oxygen Osmolality Blood CO2 Blood glucose, amino acids, fatty acids |
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Osmolarity |
Temperature dependent solute concentration
Receptors or neurons in ornear the hypothalamus |
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CNS
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Integrates, modulates, and properly relays impulse to proper motor output nerve fibers
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Motor nerve fibers
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Carries impulse from CNS to proper target
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Effector Tissue
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Tissue that responds to the order caused by the impulse
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