The Jarisch-Herxheimer reaction is associated with the clearance of organism from the bloodstream and the release of cytokines within hours of antibiotic treatment. With which spiro-chete is this condition associated?
a. Treponema
b. Borrelia
c. Leptospira
d. Brachyspira
B
Treatment of relapsing fever (caused by Borrelia recurrentis) with antibiotics may result in the formation of the Jarisch-Herxheimer reaction. This reaction is associated with the clearance of the organisms from the bloodstream and the release of cytokines within hours of antibiotic treatment. The patient experiences tachycardia, chills, rigors, hypotension, fever, and diaphoresis. Death may be associated with the reaction. An acute respiratory distress syndrome has also been recognized in cases associated with tickborne relapsing fever.
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Sea anemones have a(n) __________ that causes
them to extend into a feeding position when longitudinal cells __________ and radial cells __________. a. hydrostatic skeleton; contract; relax b. endoskeleton; contract; relax c. exoskeleton; contract; relax d. hydrostatic skeleton; relax; contract e. exoskeleton; relax; contract
Movement of the forearm so that the palm faces to the rear is called
a. supination. b. pronation. c. abduction. d. adduction. e. flexion.
The correct sequence of sound waves in the ear is ________
A) eardrum > stapes > incus > malleus > inner ear B) auditory tube > incus > malleus > stapes > eardrum C) stapes > eardrum > malleus > oval window D) malleus > incus > stapes > oval window
You have crossed two Mexican hairless dogs, and the offspring are 1/3 hairy and 2/3 hairless. Given this phenotypic ratio, draw the Punnett square for this cross
What are the genotypes of the P1 and F1 dogs in this cross? List the predicted genotype as well as the phenotype for each of the offspring. Which genotypes are hairless, and which are hairy? Can you design a genetic cross that would yield a true-breeding hairless line (where all offspring are hairless)?