Stung and feels the reason to itch by the mosquito

Stung and feels the reason to itch by the mosquito
In fact, the mosquito does not " sting people " . Its mouthpart works like the thing that the syringe draws blood, after being stung by the mosquito, it is not that it is " gripping " to sting the feeling itching You, but human body's immunoreaction to that a certain material secreted in its saliva produced.
When the blood vessel in the skin is less than 5%, the mosquito should find the blood vessel first, it saws the mouthpart back and forth and organizes and inserts and organizes once every 10 seconds under the skin, until it finds a blood vessel. At the same time anticoagulatory to each secrete pharmaceutical in order to preventing blood from being solidified,in this way mosquito is be lasting suck to blood.
In order to resist such anticoagulatory pharmaceutical, the immune system releases a chemical material called ergamine. Ergamine causes the quilt " Grip " The blood vessel around of position is expanded. This causes skin surface to form our usually said little red rash. Meanwhile, ergamine will stimulate the nerve endings in the skin, make you feel pruritus.
And ergamine the intersection of body and active substance one of since, take off histidine the carboxyl in body, ergamine while organizing is by not having active combination type to exist in loose cell and grain of a cell of basophilia, there is more content in the skin, bronchus mucous membrane, intestines mucous membrane and nervous system. When the organism is stimulated by physics and chemistry or the allergic response takes places, can cause these cells to take off the particle, cause the intersection of ergamine and release, bind with ergamine receptor and produce biological effect, arteriolar, venule and maos of detailed vasodilation,etc.. A lot of allergic responses, including serious anaphylactic shock, ergamine is very important chemical mediator.
A lot of people claim to be allergic to the mosquito, are in fact mostly all that ergamine is working, this kind of people tries hard to avoid being bitten by the mosquito.
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