False in an adult the nervous system is replete with

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48. False In an adult, the nervous system is replete with both electrical synapses and chemical synapses. 49. True Rapid-succession stimulation of a postsynaptic neuron by a synaptic knob can have a cumulative effect over time that can result in an action potential. 50. True Ca ++ ions cause the release of neurotransmitters across the synaptic cleft. Labeling- label the structures on the illustration below 1. Neuron cell body (soma) 2. Axon of presynaptic neuron 3. Axon 4. Synaptic knobs 5. Action potential 6. Calcium channels (voltage-gated) 7. Synaptic cleft 8. Stimulus-gated channels (Sodium) 9. Neurotransmitter 10. Synaptic knob 11. Voltage-gated sodium channels 12. Voltage-gated potassium channels 7 8 9 10 1 11 1 2 3 2 5 6 4 12 Page 401 Page 400 Page 400 Page 403 P. 399 P. 403 P. 401
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Chapter 12 7 Neurotransmitters 51. Neurotransmitters are released in a synapse and bind to:
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