They are messengers which can cross the gap 8 explain

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They are messengers which can cross the gap 8. Explain what is meant by a chemical synapse being “one way only.” Data can travel only from presynaptic to post synaptic membranes
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Neurotransmission at Chemical Synapses 9. An action potential arriving at the presynaptic membrane causes Ca +2 ions to flow through channels into the cytosol. What affect does this have on the vesicles containing neurotransmitters ? Ca+2 ions bring the release of neurotransmitters from vesicles 10. What do the neurotransmitter molecules do once they are released into the synaptic cleft ? The neurtransmitters chemicals travel across the synaptic cleft, and then bind together to receptors. 11. Neurotransmitters cause postsynaptic ion channels to open. Explain how this can lead to either a graded potential or a hyperpolarization . The neuotranmitter binds to the postsynaptic membrane. Opening such channels as postassium that will the inner membrane surface less positive and hyperpolarize the membrane 12. What causes an action potential to be generated? An action potential gernates when depolarization of the membrane potential to the threshold Excitatory and Inhibitory Potentials 13. Opening postsynaptic sodium ion channels cause graded potentials in that membrane. Explain why these are referred to as Excitatory Postsynaptic Membrane Potentials ( EPSPs ).
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