How can a Type III Immunopathology lead to skin issues? Question 9 options: IgE mediated histamine release Macrophages are called to the site via Th1 cells IgG anti-skin antibodies Evaporation from blood can lead to skin issues
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3. Botulinum toxin and tetanus toxin are closely related neurotoxins; therefore, they act the same way and cause the same type of paralysis. 4. Blood cells that play an important protective role in helping us kill & destroy worms (helminthes) are microfold cells. 5. The class of antibody in an antibody response to an antigen is always the same each time the body responds to the same antigen. 6. Our textbook considers these normal microbiota to be part of the innate immune response because their presence might be able to prevent pathogens from colonizing the host at certain body sites by competing with the pathogens for nutrients or receptor sites, by producing substances such as bacteriocins that are harmful to the pathogens, or by altering conditions that could affect the growth of the pathogens. 7. The ability of a phagocytic cell to migrate from a blood vessel to an area where there is tissue damage involves the phagocytic cell squeezing in between endothelial cells lining the blood vessel. This process is known as peregrination. Multiple Choice - Exam 4 only 8. Responses of the innate immune response are activated by protein receptors in the plasma membrane of defensive cells such as macrophages. These activators include molecules referred to as ______ which attach to various commonly found components on pathogens called pathogen-associated molecular patterns (PAMPs) which include molecules like lipopolysaccharide. a) Toll-like receptors b) major histocompatibility complex receptors c) Fc receptors d) prostaglandin receptor 9. Histamine, produced in an allergy response and during inflammatory responses, causes an increase in the permeability of capillary walls as well as ______ of blood vessels. Therefore, when a person has an overwhelming allergy response they will suffer from ______ blood pressure. a) constriction ; low b) dilation ; low c) constriction ; high d) dilation ; high 10. T helper 1 cells release the cytokine ______ which results in macrophage activation so that the macrophages are better able to take care of intracellular pathogens like the tuberculosis bacterium. a) gamma interferon b) apoptopin c) properdin d) serotonin 11. Some microorganisms can increase the amount of the sugar sialic acid on their surface such as by attaching it to their lipopolysaccharide or lipooligosaccharide. This interferes with the functioning of ______. a) antibody-dependent cell mediated cytotoxicity b) the complement cascade c) agglutination d) margination
Sri K.
13. Match the following types of hypersensitivities to the appropriate statements. Types may be used more than once. (5 pts) A. Hypersensitivity type II B. Hypersensitivity type III C. Hypersensitivity type IV __ Not mediated by antibodies but mediated by Th1 CD4 cells and CD8 cytotoxic T cells. Occurs mainly on second exposure to the allergen. __ Tissue damage occurs by the recruitment of immune and inflammatory cells such as neutrophils, and the activation of complement. This is seen mostly in Rheumatoid Arthritis and SLE. __ Inflammatory response is seen as a fluid buildup, accumulation of macrophages and localized tissue damage. Contact dermatitis is an example. __ Immune complexes are formed when soluble antigens and antibodies form large structures or lattices that can precipitate out of solution and get stuck at various anatomical filtering sites. __ Involves complement-activating antibodies IgG and IgM and antibody and complement mediated lysis, opsonization and antibody-directed cellular cytotoxicity.
Madhur L.
Symptoms of delayed cell-mediated hypersensitivity reactions are due to IgG antibodies. antigens present in blood. neutrophils attacking epithelium of tissue cytokines produced by T cells IgE antibodies
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