True or false? The leukocytes of the innate immune system are B cells, macrophages, and neutrophils.
You are watching: The words “antigen” and “virus” are interchangeable.
Which of the following statements best describes the role of mast cells in the inflammatory response?
They release chemicals that dilate blood vessels near the wound site, allowing blood components to enter the region from the bloodstream.
The site of inflammation may become swollen due to the increased numbers of cells and fluids at the site and painful due to signals from pain receptors.
is a foreign molecule that evokes a specific response by a lymphocyteAntigen molecules can be a part of any type of organism. Antigen molecules could also be a part of a product of an organism such as pollen or feces.
The fact that there are about a million different antigen receptors possible in human B cells is based on _____.
recombination of the segments of the receptor DNA that make up the functional receptor genes of differentiated B cells
False;A virus, like other pathogens, has numerous antigens on its surface, so the words “antigen” and “virus” cannot be used interchangeably.
A man who has been exposed to the flu virus is tested by his physician. The physician notes that the virus is present but no measurable level of antibodies corresponding to the virus are detected in his body.What might this mean?
The role of cytotoxic T cells is the secretion of _____, which plays a role in the _____ immune response.
Clonal selection is the division of _____ that have been stimulated by binding to an antigen, which results in the production of cloned _____.
Tissues are immunogically “typed” before an organ transplant to make sure that the donor and recipient match as closely as possible in their _____.
Which of the following is an INACCURATE statement regarding lymph nodes?Immune system cells are only located in the cortex.Lymph is channeled toward the hilus.Nodes can have several efferent and afferent vessels.Trabeculae compartmentalize the node.
a group of proteins that act together in a cascade fashionthe complement system is part of the immune system that enhances the ability of antibodies and phagocytes to clear pathogens from the individual promotes inflammation and attack on pathogens part of the innate immune system that helps the adaptive immune system
Which of the following are similarities between B cells and T cells? I) They both recognize antigen using immunoglobulin receptors. II) Both B cells and T cells undergo clonal selection after encountering an antigen. III) B cells and T cells both maintain an immunological memory of previously encountered antigens.
Which of the following components of the immune system destroys cancerous cells by punching holes in plasma membranes and triggering apoptosis? toll-like proteinsmacrophagesplasma cellscytotoxic T cells