Humoral immunity, which is based on the antigen–antibody response, is brought about by which type of cell?
A. Macrophages
B. B cells
C. T cells
D. Natural killer cells
b
Rationale: Humoral immunity is based on the antigen–
antibody response. B cells, which are responsible for humoral immunity, produce circulating antibodies to act against an an-tigen.
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A patient's laboratory coagulation test results in an immediate correction of the PT and aPTT after mixing studies and no correction after performing the PT and aPTT after a 2-hour incubation at 37 °C. What is the possible deficiency or inhibitor?
a. Factor deficiency b. Lupuslike anticoagulant c. F-VIII inhibitor d. F-V loss
Connective tissue is the MOST common tissue
Indicate whether the statement is true or false
A diet that is high in ________ may help prevent osteoporosis.
Fill in the blank(s) with the appropriate word(s).
Which of the following is examined by a sigmoidoscopy?
a. Stomach b. Small intestine c. Large intestine d. Sigmoid colon