BIOL 100 Quiz 8

an allergen

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

antigen presenting cell

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:

A

The advantage of having memory cells in our specific defenses is. A. if exposed to an antigen a second time, they quickly become plasma cells. B. they prevent production of other proteins so that antibodies can be produced. C. they prevent viruses from entering the body a second time. D. they produce antibodies and can become phagocytic.

direct contact

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

mast cells

The release of chemicals from injured cells triggers histamine release from

B lymphocytes

The type of cells responsible for producing and releasing antibodies is

thymus

This is the location of the maturation of T lymphocytes

interferons

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

antigens of the pathogen

Vaccines contain

B

Which of the following is characteristic of T lymphocytes but not B lymphocytes? A. production of plasma cells B. direct attack of antigen-bearing cells C. maturation in the red bone marrow D. antibody-mediated immunity

they filter lymph fluid

Which of the following is true regarding lymph nodes? A. They filter lymph fluid. B. They are located only in the digestive tract and neck. C. Macrophages but not lymphocytes can be found within lymph nodes. D. Lymph flows from the lymph vessels to the urinary system.

all of the above are correct

Physical and chemical barriers that form the body's first line of defense against pathogens include A. tears. B. resident bacteria. C. All of the above are correct. D. defecation.

D

When comparing viruses and bacteria, which of the following is correct? A. Viruses and bacteria reproduce on their own. B. Viruses have membrane-bound organelles; bacteria do not have membrane-bound organelles. C. Viruses are larger than bacteria. D. Viruses and bacteria contain genetic material.

cell-mediated immunity

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

T helper cell

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?