What specific cells attack tumor cells and virus-infected cells?
Neutrophils
Regulatory T cells
Natural killer (NK) cells
Memory T cells
The Correct Answer is C
A. Neutrophils are a type of white blood cell that primarily responds to bacterial infections and perform phagocytosis, not specifically attacking tumor or virus-infected cells.
B. Regulatory T cells help regulate the immune response and prevent excessive immune activity, but they do not directly attack tumor or virus-infected cells.
C. Natural killer (NK) cells are a type of lymphocyte that plays a key role in the body's defense against tumor cells and virus-infected cells by directly attacking and destroying them.
D. Memory T cells are responsible for "remembering" a previous pathogen, enabling a quicker response upon future exposure, but they do not directly attack tumor or virus-infected cells.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. Chyle is a milky fluid formed by the combination of fat globules and lymph. It is absorbed by lacteals (specialized lymphatic vessels) in the small intestine and transports dietary fats to the lymphatic system.
B. Plasma is the liquid component of blood, not a mixture of fat and lymph.
C. Lymph is the clear fluid that circulates in the lymphatic system, but it is not specifically mixed with fats like chyle.
D. Lacteal refers to the lymphatic vessels in the small intestine that absorb fats, but it is not the name of the fluid itself. The fluid is called chyle.
Correct Answer is C
Explanation
A. The inguinal lymph nodes are not part of the hepatic portal system. The hepatic portal system refers to the venous system that directs blood from the digestive organs to the liver, while the inguinal lymph nodes are involved in immune function.
B. The inguinal lymph nodes do not line the entrance of the spleen. The spleen is located in the upper left abdomen and has its own set of immune cells but does not directly connect to the inguinal lymph nodes.
C. The inguinal lymph nodes are located in the groin area. They are part of the body's lymphatic system and help filter lymph fluid from the lower extremities and genital region.
D. Kupffer cells are specialized macrophages found in the liver, not in the inguinal lymph nodes. These cells are involved in the filtration of blood and the removal of pathogens and debris.
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