Answer:
Helper T cells are arguably the most important cells in adaptive immunity, as they are required for almost all adaptive immune responses. They not only help activate B cells to secrete antibodies and macrophages to destroy ingested microbes, but they also help activate cytotoxic T cells to kill infected target cells.
Explanation:
Helper T cells become activated when they are presented with peptide antigens by MHC class II molecules, which are expressed on the surface of antigen-presenting cells (APCs). Once activated, they divide rapidly and secrete cytokines that regulate or assist the immune response.
1- Evaporation: Energy from the Sun causes water to become vapor and rise into the atmosphere.
2- Condensation: The water is cooled in the temperatures of the lower atmosphere, turning it from vapor into liquid water and collect into clouds.
3- Precipitation: The clouds become too heavy to remain in the sky, and it rains.
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Answer:
Its is a lysosomal storage disease!
Explanation:
<u>Hurler syndrome:-</u> is also known as mucopolysaccharidosis-I .
It Is due to the mutation on chromosome 4 .
There is a lack of of enzyme called alpha-L-iduronidase.This enzyme is present in lysosomes
It causes accumulation of mucopolysaccharides because of the absent of the enzyme in the lysosome
<u>Hunter syndrome:- </u>is also known as mucopolysaccharidosis-II
It occurs due to mutation in iduronate-2-sulfatase (IDS) gene.It is an X-linked disease
