Which of the following statements about collagen isfalse?
(a) Collagen synthase organizes the mature collagen molecules into ordered collagen fibrils.
(b) Collagen is synthesized as procollagen and secreted to the outside of the cell in a secretory vesicle.
(c) The terminal procollagen domains are cleaved by a protease in the extracellular space.
(d) Cells can break down a collagen matrix using matrix proteases.
(a) Mature collagen can self-assemble into ordered collagen fibrils, and does not require a synthase for this process.
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Which of the following are part of the inflammatory response? (Check all that apply.)
_____ Antibodies and interferons are produced against the antigens. _____ Histamine and other chemicals are released, which produce redness, warmth, and edema. _____ Invading agent causes the release of pyrogens, which produce a fever. _____ Neutrophils and macrophages attack the invading microbes and contribute to the pus.
What are glycolipids
What will be an ideal response?
Triatoma, commonly called "kissing bugs," are vectors of
A) African sleeping sickness. B) Chagas' disease. C) Cyclosporiasis. D) Leishmania. E) schistosomiasis.
An astounding 20 percent of the world's freshwater runoff comes from what single source?
A) the Mediterranean Sea B) the Amazon River C) the Great Lakes D) aquifer discharge E) icebergs