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inhibitor
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The answer INHIBITOR has 6 possible clue(s) in existing crosswords.
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The word INHIBITOR is VALID in some board games. Check INHIBITOR in word games in Scrabble, Words With Friends, see scores, anagrams etc.
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Definitions of inhibitor in various dictionaries:
noun - a substance that retards or stops an activity
One that inhibits, as a substance that retards or stops a chemical reaction.
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| Possible Dictionary Clues |
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| One that inhibits, as a substance that retards or stops a chemical reaction. |
| a thing which inhibits someone or something. |
| a substance that retards or stops an activity |
| something that stops or slows down a process: |
| Inhibitor might be related to |
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An inhibitory postsynaptic potential (IPSP) is a kind of synaptic potential that makes a postsynaptic neuron less likely to generate an action potential. The opposite of an inhibitory postsynaptic potential is an excitatory postsynaptic potential (EPSP), which is a synaptic potential that makes a postsynaptic neuron more likely to generate an action potential. IPSPs can take place at all chemical synapses, which use the secretion of neurotransmitters to create cell to cell signalling. Inhibitory presynaptic neurons release neurotransmitters that then bind to the postsynaptic receptors; this induces a change in the permeability of the postsynaptic neuronal membrane to particular ions. An electric current that changes the postsynaptic membrane potential to create a more negative postsynaptic potential is generated, i.e. the postsynaptic membrane potential becomes more negative than the resting membrane potential, and this is called hyperpolarisation. In order for an action potential to be generated, depolarisation of the postsynaptic membrane needs to occur, where the membrane potential becomes more positive than resting membrane potential. Therefore, hyperpolarisation of the postsynaptic membrane makes it less likely for depolarisation to sufficiently occur to generate an action potential in the postsynaptic neurone. * Depolarization can also occur due to an IPSP if the reverse potential is between the resting threshold and the action potential threshold. Another way to look at inhibitory postsynaptic potentials is that they are also a chloride conductance change in the neuronal cell because it decreases the driving force. This is because, if the neurotransmitter released into the synaptic cleft causes an increase in the permeability of the postsynaptic membrane to chloride ions by binding to ligand-gated chloride ion channels and causing them to open, then chloride ions, which are in greater concentration in the synaptic cleft, will diffuse into the postsynaptic neurone. As these are negatively charged ions, hyperpolarisation results, making it less likely for an action potential to be generated in the postsynaptic neurone. Microelectrodes can be used to measure postsynaptic potentials at either excitatory or inhibitory synapses. * In general, a postsynaptic potential is dependent on the type and combination of receptor channel, reverse potential of the postsynaptic potential, action potential threshold voltage, ionic permeability of the ion channel, as well as the concentrations of the ions in and out of the cell; this determines if it is excitatory or inhibitory. IPSPs always want to keep the membrane potential more negative than the action potential threshold and can be seen as a "transient hyperpolarization". EPSPs and IPSPs compete with each other at numerous synapses of a neuron; this determines whether or not the action potential at the presynaptic terminal will regenerate at the postsynaptic membrane. Some common neurotransm... |