First line of defense may be described as
A) the release of prostaglandins and leukotrienes in response to microbes.
B) intact skin, mucous membranes, sebum, tears, and so forth.
C) damage resulting in cell lysis.
D) the coating of a pathogen by complement.
E) nonspecific leukocytes that secrete toxins onto the surface of virally infected cells.
B
Bloom's Taxonomy: Knowledge
Section: The Body's First Line of Defense
Learning Outcome: 15.3, 15.5, 15.6
You might also like to view...
For most purposes of studying bacterial isolates, viable counting usually gives accurate information about the number of active cells present in a culture volume
Indicate whether the statement is true or false.
Which of the following is true about haplotypes?
A. Defining a haplotype requires the identification of simple-sequence repeats (SSR) and long repetitive sequences in the human population from multiple individuals. B. Single nucleotide polymorphisms (SNP) used to define the haplotype must be very close together on the chromosome. C. Mitochondrial haplotypes are less stable because mitochondrial DNA recombines at a high frequency. D. Haplotypes of the Y chromosome are not useful because only males have them. E. Haplotypes can be used as markers to trace human migration.
The bacteria that appear to maintain balance between the members of the normal microbiota and play a vital role in limiting colonization by pathogens are
A. staphylococci. B. diptheroids. C. Candida spp. D. Malassezia spp.
When a plant moves sugars from its leaves to its roots, the sink is the
a) leaves. b) roots. c) stems. d) same as the source.