Mod:1 Lesson 10: What are the components of the immune system?

Question 1

Match the following:
\_\_\_\_ responsible for the specificity of
immune response
\_\_\_\_ group of blood proteins that aid
in destruction of foreign cells
\_\_\_\_ secreted by B lymphocytes and
specific for an antigen

A. complement
B. antibody
C. lymphocyte

Answer 1

Match the following:
C. lymphocyte____ responsible for the specificity of immune response

A. complement____ group of blood proteins that aid in destruction of foreign cells

B. antibody____ secreted by B lymphocytes and
specific for an antigen

Question 2

Differentiate between cytotoxic T lymphocytes, helper T lymphocytes, and suppressor T lymphocytes.

Answer 2

Cytotoxic T lymphocytes destroy body cells infected with viruses and other foreign antigens;

helper T lymphocytes amplify immune responses by secreting interleukins and helper factor;

suppressor T lymphocytes secrete chemicals that suppress the immune response.

Question 3

Describe the role of B lymphocytes (and plasma cells) in the immune response.

Answer 3

recognize blood-borne antigens;

secrete antibodies

Question 4

True / False Most antibodies are able to neutralize a wide variety of antigens.

Answer 4

False

Question 5

True / False IgG, the largest of antibodies, is usually the first immunoglobulin produced by the immune system after initial exposure to an antigen.

Answer 5

False

Question 6

True / False Antibodies bind to the antigenic determinant, which produces an antibody/antigen complex that is destroyed by complement and macrophages.

Answer 6

True

Question 7

Differentiate between active and passive immunity.

Answer 7

Active immunity refers to long-term, acquired immunity where antibodies are synthesized by the body in response to contact with an antigen.

Passive immunity refers to acquired immunity that results when antibodies or immune cells from another source are introduced into the body.