hlo ❣
HAPPY INDEPENDENCE DAY
PLZ ANSWER THESE FOLLOWING QUESTIONS
1. Which gland is large size at birth but reduce in size with aging
2.Non specific host defence that exists prior to the exposure to an antigen is called
3.phagocytic cells present in the tissues
4.cytokines produced by virus infected cells are
5.white blood cells that are non specific killers of microbes are
Answer only if you know answers to all the questions..
Answers
Answer:
1. The Thymus
The thymus is a lobed organ located near the heart and beneath the breastbone. The thymus is quite large at the time of birth but keeps reducing in size with age and by the time puberty is attained it reduces to a very small size.
2. Innate Immunity
Non Specific Defence mechanisms, Physical barriers-Skin,Chemicals in blood,Immune cells.
3. Monocytes
Monocytes are a type of phagocyte found in the bloodstream. They circulate around the body, and when a tissue is infected or inflamed they may leave the bloodstream and enter the tissue. In the tissue they differentiate into macrophages, which form the major resident population of phagocytes in normal tissues.
4. Tumor necrosis factor (TNF), IL-1, IL-6, IL-8, and IL-12.
When macrophages are exposed to inflammatory stimuli(virus), they secrete cytokines such as tumor necrosis factor (TNF), IL-1, IL-6, IL-8, and IL-12.
5. Phagocytes
Monocytes are the largest of the white blood cells. Macrophages are monocytes that are present in nearly all tissue. They digest cells and pathogens by engulfing them in a process called phagocytosis.