Ch 15

Question 1

Lymphatic system

Answer 1

Collection of tissues and organs that bring populations of B cells and T cells into contact with antigens.

Question 2

Lymphatic vessels

Answer 2

Flow within lymphatic system Happens here. Carry lymph.

Question 3

Secondary lymphoid organs

Answer 3

Site where antigens that Have entered the body are brought into contact with dense populations of lymphocytes.

Question 4

Antibody

Answer 4

Y shaped protein that binds antigen

Question 5

Antigen

Answer 5

Molecule that reacts specifically with either an antibody or an antigen receptor on a lymphocyte

Question 6

Cytotoxic T cells

Answer 6

Type of lymphocyte programmed to destroy infected or cancerous Self cells

Question 7

Helper T cell

Answer 7

Type of lymphocyte programmed to activate B cells and macrophages. And assist other parts of the adaptive immune response.

Question 8

Colonial selection

Answer 8

As lymphocytes mature in the primary lymphoid organ, population of cells able to recognize a variety of antigens is generated. Each cell however only responds to one epitope.

Question 9

Immature lymphocytes

Answer 9

Not fully developed their antigen specific receptors

Question 10

Naive lymphocytes

Answer 10

Have antigen receptors but have not yet encountered the antigen to which they are programmed to respond

Question 11

Activated lymphocytes

Answer 11

Are able to proliferate. They recognize that a specific antigen is present because their antigen receptor has attached to it and they have received the second signal confirming that the antigen requires a response

Question 12

Effector lymphocytes

Answer 12

These are descendants of activated lymphocytes, armed with the ability to produce specified cytokines or other protective substances. Plasma cells are examples.

Question 13

Memory lymphocytes

Answer 13

Long lived descendants of activated lymphocytes. Can quickly become activated when antigen is encountered again. These are responsible for the speed and effectiveness of secondary response

Question 14

Igm

Answer 14

First class produced during the primary response to an antigen. Principle class produced in responded to some t antigens. Activated complement system

Question 15

Igg

Answer 15

Most abundant in blood and tissue fluids. Provides longest term protection of any antibody class. Transported across placenta into the fetus bloodstream.

Question 16

Iga

Answer 16

Found on mucous membranes. Also in salvia, tears and breast milk.

Question 17

Igd

Answer 17

Accounts for less than 1% of all serum immunoglobulins. Involved with development and maturation of the antibody response. Functions not clearly defined.

Question 18

Ige

Answer 18

Barley detectable in serum. Bonds to mast cells and basophils. Bound ige allows cells to detect parasites. Involved in most alergic reactions