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.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. Killer T cells (also known as cytotoxic T cells) recognize and bind to antigens presented by infected cells. They initiate a rapid immune response to destroy the infected or cancerous cells directly.
B. Regulatory T cells help modulate the immune response by preventing overreaction or autoimmunity, but they do not directly initiate a rapid response to antigens.
C. Memory T cells remember previously encountered antigens and respond quickly upon re-exposure to the same pathogen, but they do not initiate the initial response—they are involved in secondary immune responses.
D. Thrombocytes (also known as platelets) are involved in blood clotting, not in the immune response to antigens.
Correct Answer is B
Explanation
A. Jaundice is caused by a buildup of bilirubin in the blood, typically due to liver or bile duct issues, not a blockage of lymph flow.
B. Edema occurs when there is an accumulation of fluid in tissues, which can result from a blockage in the lymphatic system (called lymphedema). This disrupts the normal drainage of lymph, causing swelling.
C. Varicose veins are swollen, twisted veins, typically caused by poor blood circulation, not lymphatic blockage.
D. Anemia is a condition where there is a deficiency of red blood cells or hemoglobin, and it is not related to a blockage of lymph flow.
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