In a routine examination, some blood is taken and analyzed. The results show a high IgM titer for the mumps virus but a low IgG anti-mumps titer. This would indicate the person was recently infected with mumps.
This is the most common antibody. It is in the blood and other body fluids and protects against bacterial and viral infections. It may take time for IgG to form after infection or immunization. The presence of detectable IgG class antibodies indicates previous exposure to mumps virus through infection or immunization. Individuals who test positive are considered immune to the mumps virus. People with a history of mumps vaccination may not have detectable mumps IgM antibodies regardless of the timing of sample collection. IgG test results are usually positive and elevated at the initial blood draw.
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Answer:
c.
Explanation:
Kidneys regulate all fluids in the body. They can conserve fluid usage if dehdrated and can expel water if there is too much, by peeing.
Answer:
Option A, Release of chemical signals by keratinocytes that have been damaged by UV light will increase the production of melanin.
Explanation:
Negtaive feedback mechanism of homeostasis maintains the stability of any internal condition or function through lessening of output of a system or through slow down of a functional system.
Here in this case the keratinocytes function is reduced by damaging them on exposure to UV light which further triggers the release of chemicals that enhance the production of melanin.
Hence, option A is correct
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