Answer:
1) Macrophages ingest antigen 2) Helper T cells are activated 3) B cells differentiate into plasma cells and memory cells.
Explanation:
Innate immunity and adaptive immunity provide protection against foreign invaders. Innate immunity is non specific and adaptive immunity is specific immune response; includes the production of antibody after a sequence of events.
- When an antigen enters the body the phagocytic cells such as macrophages and dendritic cells ingest the antigen by a process called as phagocytosis. These cells act as antigen presenting cells and present it to T cells.
- T cells are of two types T helper cells and T cytotoxic cell. T cytotoxic cells killed the affected cell such as affected by virus while T helper cells signal for the production antibodies.
- Antibodies are produced from the plasma cells while memory cells act as record keeping. The plasma cells are stimulated by interleukins.
Houston normally receives 49.77 inches (1,264 mm) of precipitation on 104.0 days annually. The most precipitation to fall in one year was 83.02 inches (2,108.7 mm) which occurred in 1979. Houston has received less than 20 inches (510 mm) of rain only once: 17.66 inches in 1917.
3 pieces of evidence for Continental Drift
fossils, climate, geology
"Proton" <span>determines the identity of an element!
So, option A is your answer!
Hope this helps!</span>
<span>When all the waves are seen together, they make white light. Ultraviolet (UV) light-- is electromagnetic radiation with a wavelength shorter than that of visible light, but longer than X-rays, in the range 10 NM to 400 . ... X- Rays -- have smaller wavelengths and therefore higher energy than ultraviolet waves.</span>