Physiology MCQs: Circulation
04/06/02
1. Regarding circulating body fluids
a. 75% of cells in the bone marrow belong to the WBC
producing myeloid series
b. The average half life of a neutrophil in the circulation is 6
hours
c. C3b leads to opsonisation of bacteria
d. Cellular immunity is mediated by T lymphocytes
e. All of the above are true
2. The following pairings of immunoglobulin and function are correct
EXCEPT
a. IgG = complement fixation
b. IgE = pentamer with J chain
c. IgD = Ag recognition by B cells
d. IgM = Plasma concentration = 120 mg/dl
e. IgA = localized protection in external secretions
3. Which of the following tissues has a conduction rate of 0.05 m/s?
a. Ventricular muscle
b. Bundle of His
c. Atrial pathways
d. AV node
e. Purkinje system