The phagocyte termed dust cell is found in the:
Blood
Lung
Liver
Small intestine
The Correct Answer is B
A. Blood contains various types of cells, such as red blood cells and white blood cells, but dust cells are not found in the blood.
B. Dust cells are a type of macrophage found in the lungs. They are responsible for engulfing and clearing inhaled particles, dust, and pathogens from the respiratory system.
C. The liver contains Kupffer cells, which are macrophages that filter blood, but dust cells are not found in the liver.
D. The small intestine contains various immune cells, but dust cells are not among them. The small intestine has its own specialized immune cells like Peyer's patches.
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Related Questions
Correct Answer is D
Explanation
A. Autoimmunity is a malfunction of the immune system where the body attacks its own tissues — it is not a type of protective immunity acquired through infection or exposure.
B. Species immunity refers to natural resistance to certain diseases that affect other species (e.g., humans not being susceptible to some animal viruses), not immunity acquired through infection.
C. Passive immunity involves receiving antibodies from another source (like from mother to baby or via antibody-containing injections) and does not require the immune system to produce its own response.
D. Active immunity is the correct answer. It develops when the body is exposed to a pathogen or its toxins and responds by producing its own antibodies and memory cells, providing long-term protection.
Correct Answer is B
Explanation
A. Inguinal nodes are located in the groin area, not in the knee.
B. Popliteal nodes are located behind the knee (in the popliteal fossa) and are responsible for filtering lymph from the lower leg and foot.
C. Tibial nodes are not a specific term used for lymph nodes in the knee area.
D. Mesenteric nodes are located in the abdomen and are associated with the digestive system, not the knee.
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