Quizlet Module 5 Vocabulary

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  1. All-or-None Law of Skeletal Muscle Contraction: An individual muscle fiber contracts with equal force in response to each action potential.
  2. Maximal Stimulus: A stimulus which is strong enough to create action potentials in all the motor neurons innervating a whole muscle.
  3. Muscle Tone: The state of partial contraction in a muscle, even when the muscle is not being used.
  4. Neuron: The functional unit of the nervous system, a nerve cell.
  5. Neurotransmitter: A chemical released by a neuron. This chemical travels across the synaptic cleft, allowing the neuron to communicate with another cell.
  6. One motor neuron and all the muscle fibers it innervates.: Motor Unit
  7. Sarcomere: The repeating unit of a myofibril.
  8. Submaximal Stimuli: Stimuli of increasing strength that create more action potentials along more neurons.
  9. Subthreshold Stimulus: A stimulus too small to create an action potential in a neuron.
  10. Synapse: The interface between a nerve cell and another cell.
  11. Threshold Stimulus: A stimulus strong enough to create one action potential in a neuron.