Chapter C6. Il sistema linfatico e l’immunità #108766

The lymphatic system

Lymph nodes

A:

block the flow of lymph.

B:

decrease in size during an illness.

C:

contain B cells and T cells.

D:

filter blood.

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The lymphatic system

Which of the following is not a function of the lymphatic system?

A:

produces red blood cells

B:

returns excess fluid to the blood

C:

transports lipids absorbed from the digestive system

D:

defends the body against pathogens

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Innate immunity

Mechanisms that protect the body against any infectious agent are called

A:

adaptive immunity.

B:

innate immunity.

C:

barriers to entry.

D:

immunity.

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The lymphatic system

Which one is mismatched?

A:

red bone marrow—production of blood cells

B:

lymph nodes—cleaning of lymph

C:

spleen—maturation of all types of blood cells

D:

thymus—production of thymic hormones

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Innate immunuity

Which of the following is not a goal of the inflammatory reactions?

A:

Bring more oxygen to the damaged tissues.

B:

Decrease the number of white blood cells in damaged tissues.

C:

Decrease blood loss from a wound.

D:

Prevent entry of pathogens into damaged tissues.

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Innate immunity

Complement

A:

is an innate defense mechanism.

B:

is involved in the inflammatory response.

C:

is a series of proteins present in the plasma.

D:

plays a role in destroying bacteria.

E:

All of these are correct.

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The lymphatic system

B cells mature within the

A:

lymph nodes.

B:

spleen.

C:

thymus.

D:

bone marrow.

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Adaptive immunity

Active immunity may be produced by

A:

having a disease.

B:

receiving a vaccine.

C:

receiving gamma globulin injections.

D:

receiving antibodies from the mother's blood.

E:

receiving prepared antibodies.

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Adaptive immunity

The clonal selection model says that

A:

an antigen selects certain B cells and suppresses them.

B:

an antigen stimulates the multiplication of B cells that produce antibodies against it.

C:

T cells select those B cells that should produce antibodies, regardless of antigens present.

D:

T cells suppress all B cells except the ones that should multiply and divide.

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Adaptive immunity

Unlike B cells, T cells

A:

are components of adaptive immunity.

B:

require help to recognize an antigen.

C:

are types of lymphocytes.

D:

contribute to homeostasis.

Scelta multipla