What procedure removes a damaged cornea and replaces it with a human donor cornea?
a. Dacryocystorhinostomy
b. Keratoplasty
c. Evisceration
d. Vitrectomy
ANS: B
Keratoplasty removes a damaged cornea and replaces it with a healthy cornea from a human donor. Keratoplasty is the most successful transplantation procedure because the cornea is avascular and has less rejection.
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The indivisible unit that is termed a packet of energy in quantum theory is termed a(n)
A) proton B) atom C) molecule D) photon
Five minutes after you assist a patient with her epinephrine auto-injector, she states that she feels much better and would like to refuse additional care. What of the following statements would be most appropriate given the situation?
a. "If you feel better now, there is probably no need to go to the hospital. But you should get another auto-injector." b. "Now that you have taken your epinephrine, you should to go to the hospital for additional care." c. "Epinephrine can make your heart race. But don't worry, you don't need more care; just be sure that someone is with you." d. "The epinephrine will wear off in 10 to 20 minutes. As long as you have another injector I can watch you and see what happens."
If the rate is 20-40 beats per minute and the QRS measures over 0.12 sec, you should suspect that the pacemaker controlling the heart is located in the:
A) SA Node. B) atria. C) AV junction. D) ventricles.
Duke and colleagues (2009 ) found that anti-tobacco ads broadcast on national media networks were ineffective at introducing and reinforcing tobacco control messages, especially to youth in urban areas.?
Indicate whether the statement is true or false