Principles of Biology II Ch 29

Which is correct about primary and secondary immune responses?

All answers are correct

A disease-causing agent that does not usually infect and cause disease in a person with a healthy immune system is termed a(n)

opportunistic pathogen

If a human fetus is _____ and the pregnant woman is _____, an incompatibility that destroys the red blood cells of the fetus may occur.

Rh-positive; Rh-negative

A person who has been bitten by a venomous snake needs help via passive immunity.

TRUE

If you see B cells, you know that a humoral response is underway.

TRUE

The primary immune response produces memory cells that stimulate a faster immune response on a subsequent exposure to the same foreign antigen.

TRUE

The second time that an immune system sees an antigen, a secondary immune reaction will take place.

TRUE

Why is there potential for a woman's body to recognize her fetus as foreign?

The fetus and mother are not genetically identical

The role of B cells in adaptive immunity is _____, while the role of T cells in adaptive immunity is _____.

to secrete antibodies in humoral immunity; to attack marked cells in cell-mediated immunity

A molecule that stimulates an immune-system reaction by B cells and T cells is termed a(n)

antigen

Although the lymphatic system has many similarities to the circulatory system, what can the lymphatic system accomplish that the circulatory system cannot?

collect bacteria, viruses, cancer cells, and other large particles from body tissues

The primary function of a vaccine is to

create immunological memory without causing disease

If you see cytotoxic T cells, you know that a humoral response is underway.

FALSE

Rh incompatibility is due to an immune reaction to what by a pregnant woman?

a foreign antigen on red blood cells

Which is an example of humoral immunity?

antibodies produced that destroy an invading pathogen

What is not part of the innate defense response?

antibody production

If a tumor metastasizes, this means that it has moved to another part of the body. Doctors often look in lymph nodes near a tumor for signs of metastasis. Why might cancer cells be found in lymph nodes?

because the lymphatic system collects fluids and cells from tissues

Histamine triggers vasodilation and leakiness in blood vessels during inflammation. This would be beneficial in fighting an infection by a pathogen because it would lead to

both increased number of white blood cells and their migration to site of infection

If you observe an immune reaction involving a cytotoxic T cell, it is a

cell-mediated response

The "master cells" of the immune system that initiate and coordinate the adaptive immune response are

helper T cells

You would know that a viral infection is ongoing in a body if you detect high levels of

interferon

If you were trying to block an antibody that was causing an autoimmune disease in a patient, in the antibody you would want to find a way to cover and inactivate the

variable region

A primary "antigen presenting cell," a cell that presents an antigen to a helper T cell, is a

macrophage