Chapter 13 - Workbook Flashcards
What is any molecule that can be specifically recognized as foreign by cells of the immune system called?
Antigens
What is a group of inherited cell0surface proteins called?
MHC antigens
Which cells attack body cells infected by invading pathogens, foreign cells, and cells altered by mutation?
T cells
What is the most numerous type of leukocyte?
Neutrophils
What is communication among cells referred to as?
Cell signalling
What are organisms that cause a disease called?
Pathogens
The inflammatory response brings large number of what kind of cells to destroy foreign pathogens?
Phagocytes
What inhibits the harmful bacteria that happen to land on the skin?
A large population of harmless bacteria
What happens to activated B cells?
They multiply, and within a few days, produce large clones of identical B cells.
Macrophages and certain lymphocytes release what two things that defend the body against infection?
Interleukins and tumour necrosis factor (TNF)
Which cells are responsible for antibody-mediated immunity?
B cells
What is the name for CD4 cells?
Helper T cells
When infected by viruses, which interfere with viral replication, cells secrete cytokines called what?
Interferons
What ingests and destroys foreign bacteria by engulfing it?
Phagocytes
What does a phagocyte do to an engulfed foreign bacteria?
Package it in a vesicle, and then it is killed when lysosomes release enzymes into it.
What are the cells called that mast cells release that dilates blood vessels in the affected area, and also makes capillaries more permeable?
Histamine
What are the 4 clinical characteristics of inflammation during an inflammatory response?
Heat, redness, edema, and pain
What do natural killer (NK) cells release to destroy target cells?
Cytokines and enzymes
What is another name for non-specific immunity?
Innate immunity
Some differentiated cells remain in the lymph tissues for years or decades. What are these cells called?
Memory T cells
What is it called when T cells destroy the cells of a transplant?
Graft rejection
Which type of immunity is carried out by the lymphatic system and includes both cell-mediated and antibody-mediated immunity?
Adaptive immunity
Tumour necrosis factor (TNF), interferons, and interleukins are examples of what?
Cytokines
What provides very specific responses against specific foreign molecules that have entered the body?
Adaptive immunity
Innate immunity provides general protection against what?
Pathogens
What is displayed on a B cell and can bind with a specific type of antigen?
B-cell receptor
What are a diverse group of mainly peptides and proteins that cells use to signal one another?
Cytokines
What system, that consists of more than 20 proteins present in plasma and other body fluids, is important in both innate and adaptive immunity?
The complement system
Which three types of cells function as antigen-presenting cells (APCs)?
Macrophages
Dendritic cells
B cells