Chapter 21 Questions Flashcards

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1
Q

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

A

Lymphocytes

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2
Q

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

A

Antigens

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3
Q

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

A

Passive

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4
Q

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

A

Bone

Thymus

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5
Q

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

A

Helper

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6
Q

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

A

nonspecific

first

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7
Q

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.

A

Second

Nonspecific

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8
Q

_______ attracts phagocytes and promotes tissue healing.

A

Inflammation

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9
Q

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

A

Defensive

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10
Q

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

A

Complement

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11
Q

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

A

True

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12
Q

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

A

Antigens

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13
Q

B cells secrete antibodies against pathogens and T cells attack invades

A

True

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14
Q

How do bodily secretions help protect against infections?

A

They can help remove infectious organisms from the body

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15
Q

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

_________also reproduce receptors but not ones that are secreted.

A

B cells

T cells

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16
Q

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

A

C. Is the method by which bacteria replicate

17
Q

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

A

D. All of the above

18
Q

Autoimmune diseases result when

A

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

19
Q

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

A

B. B cells

20
Q

___________cells boost immune system response

A

Helper T

21
Q

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.

A

True