1.What does inhibitory neurotransmitter do to the postsynaptic membrane ? 2.What
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1.What does inhibitory neurotransmitter do to the postsynaptic membrane ? 2.What happens when a deep polarizing graded potential meet the axon membrane at the axon hillock neuron depolarize threshold ? 3.When does EPSP happen? And what happens when it happens 1.What does inhibitory neurotransmitter do to the postsynaptic membrane ? 2.What happens when a deep polarizing graded potential meet the axon membrane at the axon hillock neuron depolarize threshold ? 3.When does EPSP happen? And what happens when it happens 2.What happens when a deep polarizing graded potential meet the axon membrane at the axon hillock neuron depolarize threshold ? 3.When does EPSP happen? And what happens when it happensExplanation / Answer
1) Inhibitory presynaptic neurons release the neurotransmitters. The released neurotransmitters binds to the post synaptic receptors these induce a change in the permeability of the post synaptic neuronal membrane for particular ions. Microelectrodes can be used to measure the post synaptic potential.
2) Graded potential is defined as the changes in the membrane potential that vary in size. When the deep polarized graded potential meet the axon membrane at the axon hillock neuron depolarize threshold the following events takes place
1) An action potential is initiated in an afferent axon.
2) Arrives at the bouton and hyperpolarizes it.
3) Then these reach to the exicitatory synapsis in the axon hillock regeion.
4) Axon hillock is the spike generating regeion.Thus the exitatory neurotransmitters are released.
3) EPSP means exitatory post synaptic potential. The EPSP happens when the flow of ions occurs. The flow of ions that causes an EPSP is an exitatory postsynaptic current. The EPSPs are Graded they have additive effect. These are the opposite of inhibitory post synaptic potentials, Which usually results from the flow of negative ions into the cell are positive ions out to the cell. When multiple EPSPs occurs on a single patch of post synaptic membrane their effect is the sum of individual EPSPs.
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