What hormone is secreted by alpha cells of the pancreas in response to hypoglycemia?
A. Glucose
B. Glucagon
C. Cortisol
D. Insulin
E. Glycogen
Answer: B
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Flagella occur in both prokaryotes and eukaryotes. Which of the following statements DOES NOT describe how the flagella of prokaryotes and eukaryotes differ?
A. Eukaryotic flagella have microtubules in a cytoskeleton whereas prokaryotic ones do not. B. Eukaryotic flagella have the motor protein dynein whereas the prokaryotic one does not. C. The eukaryotic flagellum is covered by the plasma membrane whereas that of the prokaryotes is not. D. Prokaryotic flagella have a basal apparatus and hook that rotates the filament whereas eukaryotic flagella do not. E. The filament of eukaryotes is multilayered whereas that of prokaryotes is a single strand.
Which medium can be described as a nutritionally rich medium used to grow various microor-ganisms, either as a broth or as an agar, with or without added blood?
a. Chocolate b. Colistin, nalidixic acid (CNA) blood c. Brain-heart infusion (BHI) d. Thioglycollate broth
Generally, the only physical finding in a patient with a prolapsed mitral valve is:
A) a chronically irregular heart rate. B) sharp chest pain following strenuous exertion. C) dyspnea and palpitations while in a sitting position. D) a clicking sound heard during cardiac auscultation.
MRSAs are Staphylococcus aureus strains that are
A. resistant to mupirocin B. responsive to mupirocin C. resistant to penicillin derivatives D. responsive to penicillin derivatives E. related to Streptococcus pyogenes