A wound scar that is sharply elevated, irregularly shaped, and progressively enlarging is a result of excessive amounts of _____ accumulated during connective tissue repair
a. elastin
b. collagen
c. keratin
d. calcification
ANS: B
Irregular scar formation is due to excessive fibroblast activity and collagen formation.
Irregular scar formation is not due to excessive elastin, keratin, or calcification.
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The platelet function analyzer standardized the bleeding time method by eliminating the variables of the method. Which of the following represents the variables of bleeding time?
a. Dependence on the presence of calcium b. Ingestion of aspirin c. Room temperature, depth, location and direction of the incision; movement of the arm, and laboratician experience d. Abnormal platelet count
When titrating the FiO2 level downward from 100% to 40%, what is the maximum increment that should be applied between estimates of oxygenation?
a. 5% b. 10% c. 20% d. 25%