Answer:
Cell-mediated immunity develops through a network of interactions that results in defense against microorganisms that survive within phagocytes or other cells. The response is initiated by the recognition of intracellular microorganism antigen by T cells through the histocompatibility complex. In the CD8 response, only the target cell carrying the class I associated antigen can be lysed or induced to apoptosis. In another mechanism of the cellular response, CD4 + Th1 T cells activate, for example, cytokine-infected macrophages such as IFN. When a pathogen resists the effects of activated macrophages, chronic infection may develop.
The hormonal immunity response leads to the destruction of extracellular microorganisms and prevents or decreases the spread of intracellular cells by neutralizing, opsonizing and activating the complement system.
The major organ of the circulatory system that causes blood to flow through the body by its pumping action is the heart.
Carbon dioxide (CO²) is taken in to start the Calvin Cycle.
For children with most physical disabilities and
other health impairments, a common cause of academic difficulties is erratic or
irregular school attendance.
Class attendance or school attendance is very important
for your academic carrier because if you are not able to attend the class, you
did not learn anything, you did not finish your homework etc. and when the
exams came you did nothing. So, the children with physical disabilities or
other health issues mostly misses the class due to health issues, and this
irregular attendance causes difficulties in academic carrier.
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