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Related Topics
Cards In This Set
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What are the components of a reflex arc?
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1) Receptor2) Sensory Neuron3) Integration Center4) Motor Neuron5) Effector
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Receptor
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Site of the stimulus action
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Sensory Neuron
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Transmits afferent impulses to the CNS
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Monosynaptic Reflex
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The integration center is a single synapse between a sensory neuron and a motor neuron
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Polysynaptic Reflex
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The integration center involves multiple synapses with chains of interneurons
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Motor neuron
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Conducts efferent impulses from the integration center to an effector organ
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Effector
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Muscle fiber or gland cell that responds to the efferent impulses by contraction or secreting
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Somatic Reflexes
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Activate skeletal muscle
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Autonomic Reflexes
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Activate visceral effectors(smooth or cardiac muscles or glands)
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Somatic reflexes mediated by the spinal cord
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Spinal reflexes
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What 2 pieces of information does the nervous system need to know about the current state of the muscle?
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1) length of the muscle
2) amount of tension in the muscle |
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What provides the information about the length of the muscle? Where are they found?
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Muscle spindles found in the skeletal muscle
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What provides the information about the amount of tension in the muscle?
Where are they found?
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Golgi tendon organs found in the tendon
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Intrafusal muscle fibers
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Modified skeletal muscle fibers enclosed in a CT capsule
intra = within; fusal = the spindle |
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Extrafusal muscle fibers
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The effector fibers of the muscle
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