Ch. 21
An advantage to adaptive immunity is ________. a. the ability of its individual cells to respond to many different pathogens b. the use of antibodies that cause direct cell lysis and directly kill invading cells c. its need for several cells to be activated over several days on first exposure d. its memory cells that provide quicker, larger and more efficient immune response upon second exposure to an antigen
d. its memory cells that provide quicker, larger and more efficient immune response upon second exposure to an antigen
Inflammation____________. A. Is chases by bacterial activity to enhance the spread of disease B. Is caused by viral activity to enhance the spread of the disease C. Slows the healing process with swelling that can impair bodily function D. Brings more leukocytes to the sight of infection
D. Brings more leukocytes to the sight of infection
A cellular component of the innate defenses includes ______________. A. Natural killer cells B. T cells C. B cells D. Plasma cells
A. Natural killer cells
A cellular component of the innate defenses includes ______________. A. Natural killer cells B. T cells C. B cells D. Plasma cells
A. Natural killer cells
All but one of the following occurs during the inflammatory response. Select the example below that does NOT describe the process of inflammation. A. Inflammation increases capillary permeability. B. Chemotaxis draws leukocytes to the site of injury. C. Vasoconstriction prevents excessive blood loss due to injury. D. Release of prostaglandins results in pain.
C. Vasoconstriction prevents excessive blood loss due to injury.
All but one of the following occurs during the inflammatory response. Select the example below that does NOT describe the process of inflammation. A. Inflammation increases capillary permeability. B. Chemotaxis draws leukocytes to the site of injury. C. Vasoconstriction prevents excessive blood loss due to injury. D. Release of prostaglandins results in pain.
C. Vasoconstriction prevents excessive blood loss due to injury.
Which of the following does NOT describe actions of interferon (IFN)? A. Virtually Infected cells can release interferon which attracts NK cells to attack and kill the IFN secretive cell. B. IFN binds to normal, uninfected, cells stimulating the activation of genes that produce anti-viral proteins. C. IFN will attract macrophages to the secreting cell to be removed by phagocytosis. D. IFN can penetrate the viral capsid and destroy the virus.
D. IFN can penetrate the viral capsid and destroy the virus.
Natural killer cells destroy target cells or pathogens by ingestion and destruction of particle matter in a process called phagocytosis. True or false
False
Peyer's patches are clusters of lymphoid tissue found primarily in the large intestines. True or false
False
The respiratory burst produced by activated macrophages releases free radicals which are effective at killing pathogens. True or false
True