The Immune System
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Define Acquired immunity
Which of the following are true for the immune system?
It works as a defense mechanism for the body
Leukocytes are a part of the immune system
Spleen, bone marrow and lymph nodes are a part of the immune system
Heart, blood and liver are a part of the immune system
Surgical removal of thymus of a new born shall result in failure to produce
Monocytes
B-lymphocytes
T-lymphocytes
Basophils
- A - 2, B - 3, C - 4 and D - 1
- A - 2, B - 4, C - 1 and D - 2
- A - 4, B - 3, C - 2 and D - 1
- A - 3, B - 1, C - 4 and D - 2
- Examples - Saliva in mouth and tears in eyes
Type of immunity - Physical barriers - Examples - Mucus coating of epithelium lining the urinogenital tract and the HCl in stomach
Type of immunity - Physiological barriers - Examples - Polymorphonuclear leukocytes and monocytes
Type of immunity - Cellular barriers - Examples - Anti-tetanus and anti-snake bite injections
Type of immunity - Active immunity
In acquired immunity
Body prepares antibodies against an antigen
Antibodies from outside are injected into the body
Both B and C
Antibodies are present right from birth
Which of the following are true for the immune system?
It works as a defense mechanism for the body
Leukocytes are a part of the immune system
Spleen, bone marrow and lymph nodes are a part of the immune system
Heart, blood and liver are a part of the immune system
Read the following passage and answer the questions:
Our body has a defence system to protect against invading microbes. The outermost line of defence is the barrier that prevents the entry of microbes into the body, and if they enter, phagocytic cells kill the microbes. This forms the local defence system of the body. The innermost line of defence includes the formation of specific antibodies that combine with the antigen (microbe) and then destroy it. This is called specific immunity.
What are the mechanical barriers that prevent microbial entry into our body?
