Infection with Streptococcus pyogenes (bacterium that causes strep throat) may generate antibodies or T cells that react with heart muscle, which has a similar structure to the surface of S. pyogenes. These antibodies can damage heart muscle with autoimmune attacks, leading to rheumatic fever. This is an example of which of the following?
a. immunodeficiency
b. delayed hypersensitivity
c. autoimmune molecular mimicry
d. immediate hypersensitivity
c. autoimmune molecular mimicry
You might also like to view...
The characteristics of a community are generally not dependent on the spatial scale at which the community is examined because communities are tightly integrated groups of species
Indicate whether the statement is true or false
Celery stalks that are immersed in fresh water for several hours become stiff. Similar stalks left in a 0.15 M salt solution become limp. From this we can deduce that the fresh water_____
A) and the salt solution are both hypertonic to the cells of the celery stalks B) is hypotonic and the salt solution is hypertonic to the cells of the celery stalks C) is hypertonic and the salt solution is hypotonic to the cells of the celery stalks D) is isotonic and the salt solution is hypertonic to the cells of the celery stalks
When molecules move through a cell membrane from an area of greater concentration to an area of lesser concentration by way of a channel protein, it is called:
A. endocytosis B. exocytosis C. facilitated diffusion D. osmosis E. simple diffusion
I just found out that some people get repeated fungal infections because they cannot destroy these dangerous microbes after their white blood cells phagocytize them. This most likely means that these people have _______ that do not work properly.
A. ribosomes B. lysosomes C. mitochondria D. microtubules