If a small vessel is torn, which component of
the blood will temporarily fill the breach?
a. plasma proteins
b. leukocytes
c. platelets
d. erythrocytes
e. all of these
C
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Activated sludge is used in which sewage treatment step?
A. Secondary B. Tertiary C. Primary D. All of these choices are correct.
What happens to a cell that is placed in a hypertonic solution?
a. The cell swells. b. The cell shrinks. c. The cells stays the same size. d. The cell will lyse.
If the DNA from a single cell were stretched end to end, how long would it be?
a. 2 nanometers b. 2 micrometers c. 2 millimeters d. 2 centimeters e. 2 meters
How do endocrine hormones affect their target cells?
A) They cause changes in cell metabolism only. B) They increase the permeability of the target cell. C) They stimulate the synthesis of glycogen. D) They cause changes in cell metabolism and/or gene transcription. E) They affect gene transcription only.