IGA is secreted into the bloodstream, whereas _____ is secreted into mucus such as gastrointestinal fluid, colostrum, saliva, te

Question

Airida [17]

4 years ago

8

IGA is secreted into the bloodstream, whereas _____ is secreted into mucus such as gastrointestinal fluid, colostrum, saliva, te

ars, and sweat:

Biology

1 answer:

rewona [7] · Answer 1 · 2021-11-30T00:47:59+03:00

.......is secreted into the bloodstream, whereas _____ is secreted into mucus such as gastrointestinal fluid, colostrum, saliva, tears, and sweat:

a. Monomeric IgM; pentameris IgM

b. Monomeric IgA; dimeric IgA

c. Monomeric IgA; dimeric IgM

d. Dimeric IgA; monomeric IgA

Answer:

b. Monomeric IgA; dimeric IgA

Explanation:

IgA is a class of antibodies that are found mainly in body secretions. In sweat, tears, saliva, mucus, breast milk, and gastrointestinal secretions, IgA is secreted as a monomeric antibody. Smaller quantities of this class of antibodies are also present in blood and lymph. However, IgA is present in a dimeric form in the bloodstream. It makes up 10–15% of all antibodies in the blood. The main function of this class of antibodies is to give localized protection of mucous membranes against bacteria and viruses.