Which of the following are the first cells in the blood that encounter antigens?
A) B cells
B) dendritic cells
C) macrophages
D) T cells
C
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Which process occurs in the loop of Henle and is essential to urine concentration?
A. passive transport of H+ into the filtrate B. active transport of water out of the filtrate C. active transport of NaCl out of the filtrate D. passive transport of urea out of the filtrate
In a landmark case, the U.S. Supreme Court ruled that the Sierra Club could not represent the environment in a lawsuit because it failed to show how the club's members (not the environment) would be materially affected.
Answer the following statement true (T) or false (F)
Ocean thermal electric conversion systems would operate best in
A. Warm, deep tropical seas B. Cold, shallow temperate seas C. Warm, shallow tropical seas D. Warm, shallow freshwater lakes E. Cold, deep polar seas
The ____________ is the accumulation of sediment that runs parallel to shore and marks the normal limit of sand
deposition by wave action. Fill in the blank(s) with the appropriate word(s).