Drug A has affinity for and binds to a receptor creating an…
Drug A has affinity for and binds to a receptor creating an action. Drug B has affinity for and binds to the same receptor. Drug B’s receptor interaction prevents Drug A from binding to its receptor unless Drug A’s dose is increased. Drug B is a(n):
Read DetailsLike all medical/diagnostic tests, COVID-19 tests are charac…
Like all medical/diagnostic tests, COVID-19 tests are characterized by their sensitivity and their specificity. Sensitivity is: a. the ability to detect a true negative. b. the ability to detect a true positive. c. the ability to generate a true negative. d. the ability to generate a true positive. [sensitivity] Specificity is: a. the ability to detect a true negative. b. the ability to detect a true positive. c. the ability to generate a true negative. d. the ability to generate a true positive. [specificity]
Read DetailsYou have become a practicing clinician (congratulations!). Y…
You have become a practicing clinician (congratulations!). Your patient presents with an infected wound that is oozing fluid. You test some of the fluid. Use the results shown here, and the dichotomous key (below) to guide your treatment for the patient. Note the pink bacteria. Note the yellow color. Note the pink color. Note that the citrate tube is green. What is the shape and arrangement of the cells shown in the image, above? Be sure to use the technical terms for shape and arrangement for your answer. [arrangement] Based on the Gram stain results, metabolic test results, and cell morphology and arrangement, which bacterial species is most likely causing the patient’s infection? [species] Which of the following antibiotics could be used to treat the patient’s infection? a. ampicillinb. erythromycinc. penicillin [antibiotic]
Read DetailsWhy can hydrogen peroxide be used as a home remedy for “stre…
Why can hydrogen peroxide be used as a home remedy for “strep throat”? That is, what weakness of the “strep” bacteria does hydrogen peroxide exploit? a. Streptococcus species lack catalase. b. Streptococcus species lack superoxide dismutase. c. Streptococcus species lack peroxidase. d. Streptococcus species lack oxidase. [peroxide] What is the name (Genus) of a Gram-positive bacterial species that is catalase-positive? a. Streptococcus b. Staphylococcus c. Salmonella d. Pseudomonas [Genus]
Read Details