Chapter 21 Questions

Question 1

The third, specific line of defense includes white blood cells called _______.

Answer 1

Lymphocytes

Question 2

Substances found on invading organisms that trigger an immune response are called ______.

Answer 2

Antigens

Question 3

A mother passing antibodies to her baby through breast milk is a type of _______ immunity.

Answer 3

Passive

Question 4

B cells develop in the ____, and T cells reside in the _______.

Answer 4

Bone

Thymus

Question 5

Immune Cells that help bolster an immune response are called _____ T cells.

Answer 5

Helper

Question 6

The skin and mucous membrane secretions are _________ defenses that make up the _____ line of defense against infection.

Answer 6

nonspecific

first

Question 7

The _________ line of defense consists of ______ internal defenses, including white blood cells such as phagocytic macrophages, which engulf and digest foreign cells, and natural killer cells, which release chemicals that disintegrate cell membranes of tumor cells and virus-infected cells.

Answer 7

Second

Nonspecific

Question 8

_______ attracts phagocytes and promotes tissue healing.

Answer 8

Inflammation

Question 9

________ proteins, including interferon, help protect uninfected cells from becoming infected.

Answer 9

Defensive

Question 10

_______ proteins coat microbes and make them easier for macrophages to ingest.

Answer 10

Complement

Question 11

Lymphocytes are part of the third and specific line of defense in response to antigens on the surface of pathogens.

Answer 11

True

Question 12

Exposure to _______ causes increased production of B and T lymphocytes.

Answer 12

Antigens

Question 13

B cells secrete antibodies against pathogens and T cells attack invades

Answer 13

True

Question 14

How do bodily secretions help protect against infections?

Answer 14

They can help remove infectious organisms from the body

Question 15

_________ produce receptors that are found on cell surfaces or secreted as antibodies and destroy invaders.

_________also reproduce receptors but not ones that are secreted.

Answer 15

B cells

T cells

Question 16

Binary Fission
A. Allows bacterial cells to produce more plasmids
B. Allows immune cells to replicate
C. Is the method by which bacteria replicate

Answer 16

C. Is the method by which bacteria replicate

Question 17

Viral Replication
A. occurs only inside living cells
B. requires that copies of the viral genome be produced
C. requires the copies of the viral proteins be synthesized
D. all of the above

Answer 17

D. All of the above

Question 18

Autoimmune diseases result when

Answer 18

When the immune system fails to differentiate between self and non self cells

Question 19

Which of the following cell types divides to produce cells that make antibodies?
A. helper T cells
B. B cells
C. All of the above

Answer 19

B. B cells

Question 20

___________cells boost immune system response

Answer 20

Helper T

Question 21

Your immune system can recognize a virus you have been exposed to once because a cell that makes receptors to a virus multiplies on exposure to it and produces memory cells.

Answer 21

True