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vivado [14]
3 years ago
14

Pollution is not an issue in indoor environment

Health
2 answers:
OLEGan [10]3 years ago
7 0
<span>The statement is false. Indoor pollution is rather more dangerous and is caused by harmful chemicals. Due to restricted area, the desnity of the pollutants is higher indoor, and thus, they are build up more inside. This pollution is ten times more worst and may be caused by carbon monoxide, radon, moulds, etc.</span>
Elanso [62]3 years ago
3 0
<span>Pollution is an issue that people had been trying to address in order to breathe in healthier air. The pollution is caused by many factors including the transportation which the greatest contributor. Also, we have the big factories contributing to the pollution. </span>
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Local anesthetics block voltage-gated Na+ channels, but they do not block mechanically gated ion channels. Sensory receptors for
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Local anesthetics inhibit nerve conduction in a reversible manner without altering the nerve. The inhibition appears rapidly and for a longer or shorter duration depending on the products and the concentrations used. The extent of the territory rendered insensitive to pain depends on the modes of administration of the local anesthetic, either at the level of the nerve endings, or at the level of a nervous trunk, for example.

They act at the level of the neuronal membrane by interfering with the process of excitation and conduction. The anesthetic crosses the axon membrane, rich in lipids, in the form of base before taking up a cationic form on the internal face of the neuron where the pH is more acidic.

At this level, there is a blockage of nerve conduction by decreasing the membrane permeability to sodium ions that occurs during the depolarization phase. As the progression of the anesthetic action along the nerve increases, the threshold of excitability increases and the conduction time increases. This is completely blocked from a certain concentration of local anesthetic.

The nerve fibers are unequally sensitive to the action of local anesthetics: they disappear in order: the painful, thermal, tactile sensations.

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