Which structure does blood pass through immediately before entering the right atrium?
A. atrioventricular valve
B. left atrium
C. vena cava
D. semilunar valve
E. aorta
Answer: C
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Which ecological role is least likely to be performed by bryophytes?
a. enhancing the water-holding capacity of garden soil
b. stabilizing soil surfaces with a biological crust in harsh places c. supplying a food source for animals in the arctic tundra d. providing pollination services for agricultural crops e. helping to build soil on bare rock
Solutes are the liquid in which solid substances are dissolved
Indicate whether the statement is true or false
A (Coulter counter/cytometer/spectrophotometer) can measure changes in the turbidity of a bacterial culture.
Fill in the blank(s) with the appropriate word(s).
Blood cultures collected for the recovery of N. gonorrhoeae or N. meningitidis require:
a. no special methods. b. more than 0.025% sodium polyanethol sulfonate (SPS). c. transfer from Vacutainer tubes to culture broth within 1 hour of collection. d. less than 0.025% SPS.