The Nervous System

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Across
  1. 3. A collection of neuron cell bodies is called a _______.
  2. 4. The _______ nervous system is a division of the peripheral nervous system that controls the contraction of skeletal muscle.
  3. 5. An _______ post-synaptic potential can be caused by the closing of potassium channels.
  4. 8. _______ is the brain's primary excitatory neurotransmitter.
  5. 9. An action potential will be generated along an axon if the graded potential is above the _______ value once it reaches the integrating zone.
  6. 10. An _______ post-synaptic potential can be caused by the opening of chloride channels.
  7. 11. Neurotransmitter moves across the synaptic cleft by _______.
  8. 13. _______ contain the neurotransmitter and release it into the synaptic cleft.
Down
  1. 1. The long extensions that receive information from other neurons are called _______.
  2. 2. In somatic motor pathways, _______ receptors are activated at neuromuscular junctions.
  3. 5. Neurotransmitter leaves axon terminals by the process of _______.
  4. 6. The term used when multiple neurons innervate a single neuron.
  5. 7. The _______ nervous system is divided into the sympathetic and parasympathetic nervous systems.
  6. 12. Increasing the frequency at which pre-synaptic neurons fire at a post-synaptic neuron is called _______ summation.
  7. 14. Depolarisation along an axon terminal causes the opening of voltage-gated _______ channels.