Corporal eugene bullard-the son of a georgia former slave. As a member of the french foreign legion, he earned the croix de guerre (one of 15 decorations from the french government). He completed training and joined the lafayette escadrille. Despite his record of daring and dedication, he was grounded at the request of american officers attached to the escadrille. When the escadrille pilots ...
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True.
Congress enacted the air corps act 2 july 1926. The legislation changed the name of the air service to the air corps thereby strengthening the conception of military aviation as an offensive, striking arm rather than an auxiliary service. The act created an additional assistant secretary of war to help foster military aeronautics, and it established an air section in each ...
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Operation anaconda.
Senior airman jason D. Cunningham was one of the seven killed. Cunningham earned the air force cross, presented posthumously, for giving his life heroically. despite mortal wounds, he saved 10 people, and made it possible for seven others who were killed to come home. Secretary of the air force posthumously awarded the air force cross to technical sergeant john a. ...
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Typical features of bppv as described by hall & ruby:
1. Canalithiasis mechanism - This explains the latency of the nystagmus as a result of the time needed for motion of the material within the posterior canal to be initiated by the gravity.
2. Duration of the nystagmus - is correlated with the length of time required for the dense material to reach the lowest part of the ...
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Epley manuver.
This is performed by placing the head of the patient in the dix hallpike position that evokes the vertigo. The posterior canal on the affected side is in the earth vertical plane when the head is in this position. after the cessation of initial nystagmus, the head is rolled through 180 degrees, (this is done in two 90 degree increments, stopping in each position until ...
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The primary pathophysiology is located in the geniculate ganglion of the facial nerve. Geniculate ganglion is found to be affected by human herpes virus type 3 i.e. (varicella zoster virus). Varicella zoster virus have been identified from tears of these patients by polymerase chain reaction. Infact varicella zoster virus have also been identified from tears of patients with bells ...
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Rapid changes in membrane potential that spread rapidly along nerve fiber membrane. Resting: initial state, -90 mv - depolarization: sudden permeability to na+, neutralizes -90 mv - repolarization: na+ channels close, k+ channels open more, rapid k+ diffusion to exterior reestablishes -90 mv - voltage-gated na+ channel: 2 gates, 1 near the outside (activation, closed @ -90 mv open @ -70~-50 ...
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90 MV.
90 MV more negative inside fiber than in extracellular fluid - na+-k+ pump influences both ion concentrations & electropotential.
Leakage: channel protein exist in nerve membrane which k+ and na+ can leak, emphasis on k+ because 100 times more permeable to k+ - if k+ is the only ion to move through the membrane, the resting potential inside fiber would equal -94 mv ...
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Nernst potential: Diffusion potential level across membrane that exactly opposes net diffusion through membrane. Ratio of concentrations of ion on 2 sides of the membrane. Greater ratio = greater tendency for ion to diffuse in one direction = greater nernst potential required. Equation: v_s = (rt/zf) ln(s_out/s_in), v_s = potential difference, r = gas constant, t = abs. temp., f = faradays ...
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RNA has ribose backbone, uses uracil instead of thymine. Adding 2 phosphate radicals to form a triphosphate. RNA polymerase identfies & binds to dna promoter, moves down dna while unwinding dna while adding nucleotides to end of newly forming rna chain by breaking 2 phosphate bonds to create covalent linkage between phosphate & ribose. It continues until chain-terminating sequence in the ...
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