During muscle contraction,
a. the Z lines move farther away from the thick filaments
b. the A band becomes narrower
c. the H zone becomes narrower or disappears
d. the I band remains unchanged
e. both b and c occur
C
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A blood sample is taken from an individual whose blood osmolality is 295 mOsm/kg H2O. Red blood cells from this sample are then placed in the following solutions
Osmolality (mOsm/kg H2O) ? of solute 1. NaCl 300 1 2. fructose 300 0.5 3. urea 300 0 4. CaCl2 100 1 5. KCl 150 1 The red blood cells in which of these solutions will swell to the greatest degree? A. 1 B. 2 C. 3 D. 4 E. 5
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A. thrombus. B. embolus. C. prostacylin. D. hemorrhage. E. anticoagulant.
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