The accumulation of fluid at the site of a wound is the result of the secretion of:

A. neutrophils
B. leukocytes
C. histamines
D. kinins


Ans: C. histamines

Biology & Microbiology

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The main reason that mRNA transcripts are modified at the 5' and 3' ends is:

A. to ensure that all nucleotides are phosphorylated. B. to protect the RNA from nucleolytic degradation. C. so that the two ends remain associated with each otherduring transport. D. to guide the removal of introns.

Biology & Microbiology

XLD agar serves which purpose when used in the bacterial fecal culture?

a. Evaluation of general flora and predomi-nant species b. Selection of enteric pathogens such as Salmonella, Aeromonas, and others c. Inhibition of normal flora and selection of enteric pathogens d. Enrichment for enteric pathogens such as Salmonella and others

Biology & Microbiology

The greatest number of pathogens enter the body through the ________.

A. skin B. respiratory system C. gastrointestinal system D. urinary system E. genital system

Biology & Microbiology

With which of the following substrates can Streptococcus mutans make a capsule?

A) Xylitol B) Glucose C) Mannitol D) Sucrose E) All of the above

Biology & Microbiology