Viruses

Most of us at one time or an different have had colds or the grippe. The symptoms; fever, congestion, coughing, and sore throat, easily dust through offices, schools and homes, and no matter where in the world you live. Colds and the flu are hastend by viruses. Viruses are responsible for many other serious, many times deadly, diseases including; AIDS, ebola hemorrhagic fever, and hepatitis.
A virus is a tiny particle. Virus particles are about one-millionth of an adjoin large. Viruses are about a thousand times small than bacteria, and bacteria are smaller than most human cells. Viruses are so small that most brush asidenot even be seen with a light microscope, instead an electron microscope must be used. A virus particle consists of; nucleic acid, coat of protein, and lipid membrane. Viruses vary wide in their shape and complexity. Viruses dont contain the chemic machinery needed to carry out the chemical reactions for life. Instead, viruses carry completely one or two enzymes that decode their genetic instructions. So a virus must have a phalanx cell in which to live and make more viruses.
Viruses can enter the human body through the nose, mouth, or breaks in the skin. Once inside, they find a host cell to infect. on the whole viruses follow the same basic steps called the lytic cycle.



The sequence of events that occurs when you summon down with the flu or a cold is a good demonstration of how a virus works. First, an infected soulfulness sneezes near you, then you inhale the virus particle and it attaches to cells facing the inside of your nose. The virus then fervidnesss the cells lining the nose and cursorily reproduces new viruses. The host cells then break and new viruses send into your bloodstream and lungs. Viruses in the fluid that drips down your throat attack the cells lining your throat and give you a sore throat. Viruses in your bloodstream then can attack muscle cells and cause you to have muscle aches.
Viruses can exist for a long time outside the body. The way that viruses...If you want to get a full essay, order it on our website: Ordercustompaper.com



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