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16 Cards in this Set
- Front
- Back
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What are some of the major functions of the nervous system? |
Receiving sensory input, integrating information, controlling muscles and glands, maintaining homeostasis, and establishing and maintaining mental activity. |
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What are the 2 main divisions of the nervous system? |
CNS and PNS |
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Consists of the brain and spinal cord. |
CNS |
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Consists of all nervous tissue apart from the brain and spinal cord. |
PNS |
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Division of the PNS that conducts action potentials from sensory receptors to the CNS. |
Sensory or afferent division |
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Neurons that transmit action potentials from the periphery to the CNS. |
Sensory neurons |
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Division of the PNS that conducts action potentials from the CNS to effector organs, such as muscles and glands. |
Motor or efferent division |
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Neurons that transmit action potentials from the CNS toward the periphery. |
Motor Neurons |
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Transmits action potentials from the CNS to skeletal muscles. |
Somatic nervous system |
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Transmits action potentials from the CNS to cardiac muscles, smooth muscles, and glands. |
Autonomic nervous system |
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What is the Autonomic system divided up between? |
Sympathetic and parasympathetic divisions. |
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Receive stimuli, conduct action potentials, and transmit signals to other neurons or effector organs. |
Neurons |
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What are the three parts of a neuron? |
Cell body, axon, dendrite. |
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Holds the organelles. |
Cell body |
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Short, often highly branching cytoplasmic extensions that are tapered from their bases at the neuron cell body to their tips. Usually receive info from other neurons or from sensory receptors and transmit the info toward the cell body. |
Dendrites |
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A single long process extending from the neuron cell body. Conducts action potentials towards the CNS. |
Axon |
