This forms a seal that prevents the movement of substances between cells, for instance from the intestinal lumen into the blood.
A. gap junctions
B. tight junctions
C. desmosomes
D. hemidesmosomes
E. focal adhesions
B. tight junctions
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At the molecular level, which of the following best explain heterozygous advantage and overdominance?
A. A heterozygous individual can produce more varieties of homodimer proteins B. The alleles produce two different proteins with slightly different functions C. The proteins produced by the alleles may provide a broader range of environmental tolerance, such as temperature ranges D. Infectious organisms may recognize only a specific functional protein E. All of the answers are possibilities
The gastrointestinal microbiota has been implicated in the development of
A. appropriate immune responses to microbial antigens. B. dental plaque. C. non-infectious diseases like obesity. D. All of the responses are correct.
The chemotherapeutic agent must reach levels in the body that are ________ the pathogen's MIC value if it is going to be effective.
A. equal to B. greater than C. less than
When a cytoplasmic vesicle fuses with the plasma membrane, expelling its contents outside the cell, the process is known as:
A. exocytosis B. endocytosis C. phagocytosis D. active transport