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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c. An action potential reaches the axon terminal. Show more…
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Place the events in the transmission of an action potential in the correct order. 1. An action potential begins in the receiving neuron. 2. Neurotransmitters are released into the synaptic cleft. 3. An action potential arrives at an axon terminal. 4. Calcium ions enter the axon terminal. 5. Sodium ions diffuse into the receiving neuron. 6. Synaptic vesicles fuse with the plasma membrane. 7. Neurotransmitter molecules bind to the membrane of the receiving neuron. a. 1,2,6,7,4,3,5 b. 3,5,6,2,7,4,1 c. 3,4,6,2,7,5,1 d. 2,3,6,7,4,5,1 e. 7,6,5,3,4,2,1
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An inhibitory neurotransmitter may cause the movement of which ion across the membrane? a) Na+ b) Mg2+ c) K+ d) Ca2+ Excitatory neurotransmitters produce which types of electrical responses in the postsynaptic neuron? a) Hyperpolarizations b) EPSPs c) IPSPs d) Threshold level inhibitions Neurotransmitters induce membrane potential changes: a) by opening voltage-gated Na+ channels on the postsynaptic axon hillock. b) on the presynaptic cell body. c) by opening mechanically-gated Mg2+ channels on the postsynaptic axon. d) on the postsynaptic dendrites and cell body
When a neural impulse reaches the end of an axon, it triggers the release of chemical messengers called a. dendrites. b. synapses. c. action potentials. d. neurotransmitters.
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