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Define Natural killer cells (NK cells)
They are large sized lymphocytes, specifically equipped to kill virally infected cells, some of the virally infected cells acquire a special glycoprotein on their surface which signals their neighbouring cells that they are in trouble and they need help.
The NK cells are especially receptive to this cry for help because they have surface proteins which are very similar to the ones which have glycoprotein coatings. When the 2 components come together in contact, the NK cells would release lethal substances which lead to the death of infected cell. The infected cell is killed and it has a chance to multiply. The major drawback of this process is that the host cell gets sacrificed.
lable the direction of increasing frequency and the direction of increasing wavelength on the em.
Explain the Proximal Convoluted Tubule - Structures of a Nephron Proximal Convoluted Tubule or proximal tubule (PCT): The proximal tubule is the most proximal part of the renal
what is diffusion.
Saponification value of fats and oils
Handling of Chemicals : Laboratory technicians who work in laboratories, need to be aware of the potential danger of the substances they handle. In the case of those working in ch
How the Acid/Base Balance is maintained in an Acid Diet? Let us first see how the acid/base balance is maintained in an acid diet. The sequence of steps involved includes: 1
Precautions : The following must always be observed while dealing with lasers. 1) Never look along a laser beam or expose any part of your skin to it. Beware of reflected laser
why do we breathe?
You are the mayor of a beautiful city by the ocean, and your city is connected to the mainland by a set of k bridges. Your city manager tells you that it is necessary to come up wi
Blood - Abnormal Constituent of Urine In acute inflammation and trauma, blood may be present in the urine. This condition is known as haematuria. Blood may be present in cancer
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