3. Label the boxed locations on this diagram with the letters that match with its corresponding event. A. Neurotransmitters bind to ligand-gated Na+ channels B. Adequate stimulus triggers receptors C. Saltatory conduction insulates electrical signal D. Graded potentials summate and voltage threshold is reached to fire an action potential. E. Neurotransmitters are released into synaptic cleft.
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Place the following stages of transmission at a chemical synapse in order: 1. Neurotransmitter binds with receptors associated with the postsynaptic membrane. 2. Calcium ions rush into the presynaptic neuron's cytoplasm. 3. An action potential depolarizes the membrane of the presynaptic axon terminal. 4. The ligand-gated ion channels open. 5. The synaptic vesicles release neurotransmitter into the synaptic cleft. A. 3 → 2 → 5 → 1 → 4 B. 1 → 2 → 3 → 4 → 5 C. 4 → 3 → 1 → 2 → 5 D. 2 → 3 → 5 → 4 → 1 E. 3 → 2 → 4 → 5 → 1
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Text: Put the following events that lead to the generation of an action potential in the postsynaptic neuron in the proper order in which they occur by assigning each a number from 1 (first event) to 6 (last event). a. The neurotransmitter binds to a receptor. b. Sodium enters the postsynaptic neuron, generating an EPSP. c. An action potential reaches the axon terminal. d. When the EPSP reaches threshold, an action potential fires. e. An influx of calcium triggers the release of neurotransmitter. f. The neurotransmitter diffuses across the synapse.
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Arrange the events that occur during synaptic transmission. Use letters A-F to denote the correct sequence. 1. Ion channel opens 2. Neurotransmitter is released into synaptic cleft 3. Vesicle fuses with plasma membrane 4. Neurotransmitter binds to receptor 5. Action potential arrives 6. Ion channel closes
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