Question:
The first line of defence in the immune system is provided by
The first line of defence in the immune system is provided by
Updated On: Jul 29, 2022
- skin and mucous membrane
- inflammatory response
- the complement system
- none of these
Hide Solution
Verified By Collegedunia
The Correct Option is A
Solution and Explanation
Skin and mucous membrane are the physical barriers that provide the first line of defence or the external defence. These barriers prevent the entry of microorganisms into the body. Outer tough layer of the skin, the stratum corneum prevents the entry of bacteria and viruses. Mucus secreted by mucous membrane traps the microorganisms and immobilises them.
Was this answer helpful?
0
0
Top Questions on Immune System
- Antigen binding sites are present in ...............
- AP PGECET - 2024
- Biotechnology
- Immune System
- Identify autoimmune disorder
- AP PGECET - 2024
- Biotechnology
- Immune System
- Which one of the following is required for the development of B-cells in the bone marrow?
- AP PGECET - 2024
- Biotechnology
- Immune System
- Prostaglandins and leukotrienes are produced by:
- AP PGECET - 2024
- Biotechnology
- Immune System
- Name the cell which is recruited first at the place of infection.
- AP PGECET - 2024
- Biotechnology
- Immune System
View More Questions
Concepts Used:
Immune System
It consists of tissues, cells, soluble molecules like antibodies and lymphoid organs. The WBC cells called the leucocytes have a significant role as they seek out to destroy the disease-causing organisms. These leucocytes are stored in different locations in the body including the spleen, bone marrow, and thymus. These organs are called as the lymphoid organs. The leucocytes are also present in the lymph nodes of the body.It is considered as the main lymphoid orga and. It produces all the blood cells including the lymphocytes. The thymus is an organ that is present near to the heart, beneath the breastbone.
