OBJECTIVE LIFE SCIENCE
SIGNALLING IMMUNOLOGY CANCER
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Mucus
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Saliva
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Skin
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B-cells
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Detailed explanation-1: -(D) Killer T-cells – They are a part of acquired immunity. They are involved in the body’s third line of defence. And, hence they are not a part of non-specific defence. Note:It is important to remember the different types of plant, their characteristic features and examples.
Detailed explanation-2: -Non-specific defense (innate immunity) consists of mechanisms that either keep pathogens out or destroy them regardless of their type. Non-specific defense includes mechanical barriers, chemical substances, cells and inflammation. Mechanical barriers include the skin and mucous membranes.
Detailed explanation-3: -Phagocytes are the component of non-specific immune response and kill the pathogens that invade the body. Phagocyte cell engulfs the pathogen like bacteria or other small cells and digests them e.g., macrophage cells.