Which is NOT a function performed by activated macrophages?
A. They perform phagocytosis.
B. They secrete cell-killing chemicals.
C. They present antigens to T-cells.
D. They secrete cytokines involved in inflammation.
E. They produce antibodies that bind to specific antigens.
E
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Anti-A and Anti-B blood typing antibodies are of which class?
A) IgG B) IgE C) IgD D) IgM E) IgA
Tubular epithelial cells of the collecting duct and distal tubule contain receptors for what hormone
A) atrial natriuretic peptide B) antidiuretic hormone C) renin D) erythropoietin E) aldosterone
Myxedema commonly occurs in:
a. middle-aged men. b. children. c. middle-aged women. d. older women.
Most human cells range from 10 to 15 micrometers in diameter. What limits how large a cell can get?
A. Nutrients available in the environment of a cell B. A cell's lifespan C. The relationship between its length and surface area D. The relationship between its volume and surface area E. The relationship between its volume and length