Average Life Expectancy

question 25

Multiple Choice

Average life expectancy:

• A)Is originally and most rapidly increased by decreasing the number of deaths in the early years of life
• B)Is inversely correlated with death rates
• C)Is exceeded by some individuals and not achieved by others
• D)All of these
• E)None of these

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Definitions:

Humoral Immune Response

The aspect of immunity that involves the production of antibodies by B cells to target and eliminate extracellular pathogens.

Clonal Selection

The process by which an antigen selectively binds to and activates specific lymphocytes, ensuring a targeted immune response.

Antigen Recognition

The process by which immune cells identify and bind to foreign substances, triggering an immune response.

MHC Class II

Molecules found on the surface of certain immune cells, involved in the immune system's recognition and response to foreign particles.