Immunity lesson 2

Question 1

Briefly tabulate the differences with natural and acquired immunity.

Answer 1

Natural immunity is a nonspecific immunity present at birth, it responds to foreign invaders and is very similar from 1 encounter to the next

Acquired immunity is a specific immunity present after birth, it increases in intensity with repeated exposure to the invading agent.

Question 2

Briefly explain the function of specific/acquired immunity.

Answer 2

When the body is invaded, the non-specific defense acts first, immediately, as 1st and 2nd line of defense and this is called the primary response.

Question 3

What does the acquired immune system do when an antigen enters the body?

Answer 3

It takes the acquired immune system weeks or months to have produced an immune response that will automatically activate if re-exposed to the disease causing antigen.

Question 4

What does the wbc/lymphocytes do when an antigen enters the body?

Answer 4

The wbc/lymphocytes will be able to recognize and respond to the antigens. These antigens are usually found in the lymphoid organs : tonsils, spleen, blood and lymph glands.

Question 5

What are the 2 main types of lymphocytes?

Answer 5

B-lymphocyte (B-cells) = antibody-mediated immunity

T-lymphocyte (T-cells) = cells-mediated immunity

Question 6

What are the secondary lymphoid organs the mature B & T cells migrate to?

Answer 6

Spleen , Lymph nodes and Tonsils