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18 Cards in this Set
- Front
- Back
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helps to keep controlled conditions within limits that maintain health and helps to maintain homeostasis.
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Nervous System
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emerge from the spinal cord, each serving a specific region of the body.
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Spinal Nerves
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small masses of nervous tissue, containing primarily cell bodies of neurons.
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Ganglia
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help to regulate the digestive system
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Entric Plexuses
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parts of neurons or specialized cells that monitor changes in the internal or external enviroment
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Sensory receptors
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consist of brain and spinal cord
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CNS
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consists of cranial and spinal nerves with sensory and motor compnents, ganglia, and sensory receptors
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PNS
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consists of a variety of diffrent receptors as well as sensory neurons
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Sensory System
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conducts nerve impulses from the CNS to muscles and glands
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Motor System
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consists of neurons that conduct implses from receptors in the skin and skeletal muscles and special sense receptors to the CNS and motor nerons that conduct implses from the CNS to skeletal muscle tissue
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Somatic Nervous System
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contains sensory neurons from visceral organs and motor neurons that convey impulses from the CNS to smooth muscle tissue, cardiac muscle tissue, and glands
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Autonomic Nervous System
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consists of neurons in entric plexuses that exten the length of the GI tract
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Entric Nervous System
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allow communication over short and long distances
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Action Potentials
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allow communication over short distances only
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Graded Potentials
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an elictric voltage across the membrane just like beetween poles of a battery, acts as a resistor,
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Membrane Potential
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a sequence of rapidly occuring events that decrease and eventually reverse the membrane potential and than restore it to the resting state
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Action Potential
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the functional junction beetween one neuron and another or beetween a neuron and an effector cell such as a muscle or gland
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Synapse
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can depolarize or make less negative the postsynaptic neurons membrane, bringing the membrane potential closer to thereshold
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excitatory neurotransmitter
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