Chapter 2 (page 12)

Question 1

What are the primary cells of the immune system?

Answer 1

Lymphocytes and macrophages

Question 2

What are the purpose of lymphocytes and macrophages?

Answer 2

Their purpose is to recognize foreign substances and bind to them. These cells also communicate with each other so the
immune system as a whole can mount a specific response to antigens.

Question 3

Crucial cells of the immune system. It circulate throughout the body:

Answer 3

Lymphocytes

Question 4

What will happen if the cells bind to an antigen?

Answer 4

the cell will become fully mature.

Question 5

Two cells that are both originate from hemocytoblasts in the red bone marrow:

Answer 5

B-cells

T-cells

Question 6

T-cells come from lymphocytes that migrate to the where?

Answer 6

thymus

Question 7

TRUE or FALSE:
B-cells become immunocompetent in the bone marrow.
Once cells become immunocompetent it will only be able to react to one antigen.
Cells become immunocompetent before they meet the antigens they may later attack.
Therefore it is our genes that decide what substances our immune system will be able to recognize and resist.

Answer 7

TRUE

Question 8

Whether a cell becomes a B-cell or a T-cell depends on where in the body the cell becomes ______________.

Answer 8

immunocompetent.

Question 9

It is derived from bone marrow.They arise from monocytes formed in the bone marrow:

Answer 9

Macrophages

Question 10

What is the major function of macrophages?

Answer 10

is to engulf foreign particles and present the fragments of these cells on their surface to be recognized by immunocompetent cells. Therefore macrophages
present antigens to immunocompetent cells for destruction.

Question 11

Where macrophages tend to remain?

Answer 11

in lymphoid organs

Question 12

It is produced by the antibodies present in the body’s fluids. These antibodies are produced by lymphocytes (B-cells). They circulate freely in the blood and lymph where they bind primarily
to bacteria and their toxins, inactivating them temporarily and marking them for destruction by
phagocytes or complements.

Answer 12

HUMORAL IMMUNITY

Question 13

The development of B-cells is composed of ______________.

Answer 13

Two stages

Question 14

Transformation of stem cells into immature B-cells. In infants occurs in liver and bone marrow. In adults occurs in bone marrow.

Answer 14

First Stage

Question 15

Is it TRUE that an immature B-cells contain numerous cells for one specific type of antibody.

Answer 15

False

Question 16

_____________ leave the liver/bone marrow, enter blood and take up residence in lymph nodes, liver, and spleen.

Answer 16

Immature B-cells