BIOL 101 Topic 8

Which of the following types of T cells is a critical component of the immune system because it stimulates and enhances the activity of other components of the immune system?

T helper cell

Any substance that produces an inappropriate response of the immune system is referred to as

an allergen

The type of cells responsible for producing and releasing antibodies is

lymphocytes

Which of the following is true regarding lymph nodes?

They filter lymph fluid.

Which of the following is characteristic of T lymphocytes but not B lymphocytes?

direct attack of antigen-bearing cells

The release of chemicals from injured cells triggers histamine release from

mast cells

This is the location of the maturation of T lymphocytes

thymus

When comparing viruses and bacteria, which of the following is correct?

Viruses and bacteria contain genetic material.

Vaccines contain

antigens of the pathogen

Which of the following is associated with the specific defenses of the body?

cell-mediated immunity.

The advantage of having memory cells in our specific defenses is.

if exposed to an antigen a second time, they quickly become plasma cells.

The exchange of body fluids is an example of _______ transmission.

Direct contact

Physical and chemical barriers that form the body's first line of defense against pathogens include

A. tears. B. resident bacteria. C. defecation. D. All of the above are correct. D

Macrophages use phagocytosis to engulf microbes and then digest them and display their antigens on its surface to alert T cells. The macrophage is an example of a:

Antigen presenting cell

This second line of defense is effective at preventing the spread of virus to unaffected cells.

interferons