A researcher administers broad-spectrum antibiotics to laboratory mice and observes impaired learning and increased anxiety-like behavior. Which finding would most strongly support that these changes are mediated through the gut microbiome?

 A patient with lupus develops immune complex deposition primarily within which organs?

In pea plants, spherical seeds (S) are dominant to dented seeds (s). In a genetic cross of two plants that are heterozygous for the seed shape trait, what fraction of the offspring should have spherical seeds? [a]  Ss represents what type of phenotype? [b] What is the phenotype for the homozygous recessive? [c] SS represents what type of phenotype? [d]

A microbiologist compares bacterial density throughout the gastrointestinal tract. Which region normally contains the highest concentration of microbes?

A 16-year-old develops migratory polyarthritis and a new systolic murmur several weeks after untreated streptococcal pharyngitis. Which mechanism best explains this autoimmune complication?

A patient consumes a diet rich in fermentable fiber. Activation of GPR41 (FFAR3) and GPR43 (FFAR2) receptors by microbial metabolites is expected to produce which physiologic effect?

Identify these organisms. [a] True/False:  These organisms are able to undergo photosynthesis. [b] True/False:  This organism is a type of cyanobacteria. [c]

A patient has elevated circulating inflammatory cytokines due to chronic intestinal dysbiosis. Which cytokine is most strongly associated with inflammation-related depression?

A medical student asks why allergic reactions cannot occur during the first exposure to an allergen. Which process must occur before clinical symptoms develop?

Identify the image. [a] How many set of chromosomes does a diploid cell contain? [b]