Bob Is 50 Years Old

question 79

Multiple Choice

Bob is 50 years old.If he is typical for his age,what is one of his major health concerns at this stage of life?

• A)weight
• B)complexion
• C)liver disease
• D)optimal exercise

---

Definitions:

Helper T Cells

A type of white blood cell important for the immune response, helping to activate other cells to fight infections and diseases.

Immune System's Response

The reactions of the immune system against pathogens like viruses and bacteria, including the production of antibodies and mobilization of immune cells.

CD4 Count

A measure of the number of CD4+ T lymphocytes in the blood, an important indicator of immune system health, especially in the context of HIV/AIDS.