Pathogen inside the cell is killed by:
Correct answer: D. Natural killer Cell
- A. Antibodies
- B. Interferon
- C. All of these
- D. Natural killer Cell
Explanation
A natural killer cell is the cell which directly kills the cell infected by the pathogen.
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The circulatory system covers the chambers, valves and conducting pathway of the human heart, along with the cardiac cycle and control of heartbeat. It compares arteries, veins and capillaries by structure and function, and explains how the lymphatic system returns tissue fluid, transports absorbed fats and supports immunity.
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