Chapter 9

Which one type of cells is responsible for producing and releasing antibodies?

B lymphocytes

The direct cause of the heat generated by a wound or local infection is ________

Histamine, which causes the smooth muscle cells of the arterioles to relax; this leads to a cascade of events causing the tissue to become hot

Which of the following leukocytes kills its target cells, such as cancer cells or virus-infected cells, by releasing chemicals that break down the target cell membrane?

Natural killer cells

Which one 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

The pain associated with the inflammatory response is the direct result of ________

The swelling of the tissue and the chemicals released from certain cells

What is the role of mast cells in the inflammatory response?

They release chemicals that dilate blood vessels at the wound site

All of the following represent physical and/or chemical barriers that form the body's first line of defense against pathogens EXCEPT which one?

Antibodies

Which one of the following is characteristic of T lymphocytes but NOT B lymphocytes?

Direct attack of antigen-bearing cells

True or false; when you suffer an injury, white blood cells near the injury site initiate the inflammatory response

False

Passive immunity differs from active immunity in that passive immunity

Involves the administration of preformed antibodies

Inflamed tissue turns red because ________

There is an increased blood flow to the injured tissues due to dilation of arterioles in the injured area

Specific defense mechanisms differ from nonspecific defense mechanisms in that only specific mechanisms __________

Utilize B cells and T cells