Synaptic delay :-a- is the time needed for release of neurotransmitter from synaptic vesiclesb- the minimal delay time in the central nervous system is about 0.5 millisecondc- is determined by the type of the neurotransmitterd- is determined by the number of postsynaptic receptors

Describe how an action potential in the presynaptic neuron is generated in the postsynaptic neuron. Label the presynaptic neuron, postsynaptic neuron and synapse. Explain what is happening in figure on the left. Use key terms in order AND label on diagram: presynaptic axon terminal, action potential, calcium, vesicle, neurotransmitters, synapse Explain what is happening in the figure on the right. Use key terms in order AND label on diagram: neurotransmitter, postsynaptic receptor, sodium ions, excitatory postsynaptic potential (EPSP), depolarization, action potential, postsynaptic neuron

PhysioEx, Neurophysiology of Nerve Impulse

Place the following events in chronological order from 1-8: Nat enters the cell, and depolarization occurs to approximately +30 mV. The voltage across the cell membrane is -70 mV, the resting membrane potential. Upon reaching the peak of the action potential, the VG Nat channels are inactivated by the closing of their inactivation gate and the activation gate of each VG K channel opens. VG K channels close by the closing of their activation gate, and the resting membrane potential is gradually restored. An excitatory post-synaptic potential depolarizes the membrane to threshold and the activation gate of VG Nat channels open. Upon returning to the resting membrane potential, VG Na channels are reset by opening of the inactivation gate and the closing of the activation gate. VG K+ channels are slow to close, resulting in an excess of K* efflux and hyperpolarization. Depolarization occurs as K+ flows out of the cell.

Correct answer: Ligand-gated ion channel don’t open until the neurotransmitter diffuses across the synapse and binds to the receptor, The calcium channels are blocked in the presynaptic cells, It takes time for the vesicular exocytosis to occur Please explain why each of the correct answer choices are correct. Thank you.

Name and describe the roles of key molecules and membrane structures in maintaining axon membrane resting potential of-70 mV Name and describe the roles of key molecules and membrane structures in propagation of axon membrane action potentials during depolarization at +35 mV  Explain why they myelin sheath of white matter neurons allows faster action potential transmission than that of neurons found in gray matter.

What type of synaptic potential (if any; be sure to indicate if any modification is occurring as well) would occur if: a.) An MAO inhibitor type of antidepressant is functioning at an active dopaminergic synapse that increases the rate of sodium flowing into the cell. b.) Prozac is present at an active serotonin synapse where receptor activation increases the flow of potassium out of the cell.

neurotransmitters 1 In what way may drugs be used to affect neurotransmitters? Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. A drug may prevent the binding of a neurotransmitterto a receptor. b, A drug may increase the amount of neurotransmitter released. A drug may prevent the release of aneurotransmitter, d. A drug may affect the degradation of a neurotransmitter Drugemay affect neurotranemitters usng al of the mechanismslsted. Unanswered

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A neuron has a resting membrane potential of -70 milivolts (mV) and a threshold value of -55 mV. Three synapses on the body of this neuron receive the impulses listed below. hyperpolarisation by 5 mV • depolarisation by 15 mV • depolarisation by 10 mV ENTER THE MEMBRANE POTENTIAL AS A NUMBER WITH + OR - IN FRONT OF IT. The final membrane potential will be mV and this cause an action potential becasue it is v than the