Why is HIV/AIDS considered an immune deficiency disease?

A. Red, like blood:

Lymph is typically clear to pale yellow; it lacks red blood cells, which give blood its red color.

B. Formed when fluid is filtered across the subclavian veins into the tissue spaces:

Lymph forms from interstitial (tissue) fluid, not from fluid filtered from veins into tissues.

C. Formed from tissue fluid:

Lymph originates as interstitial fluid that enters lymphatic vessels and is transported back into the circulatory system.

D. Pumped by the left heart into systemic circulation:

Lymph is not pumped by the heart; it moves through the lymphatic system via muscle contractions and valves.

A. A systemic infection

A systemic infection would involve symptoms throughout the body (e.g., fever, malaise, elevated heart rate).

B. A localized infection

The signs-redness, warmth, swelling, drainage-are localized to the site of injury, indicating a local infection.

C. A normal response to the injury

While some redness or swelling is expected, greenish drainage is a sign of infection, not normal healing.

D. An allergic reaction

Allergic reactions typically involve itching, hives, or rash-not purulent drainage or warmth.