A-LevelBiologyTransport in mammals9700/12 · May/June 2011 · Q261 Mark
What events occur during contraction of the left ventricle?
AThe bicuspid valve opens and semilunar valve in the aorta opens.
BThe bicuspid valve closes and semilunar valve in the aorta closes.
CThe pressure in the left atrium becomes greater than the pressure in the left ventricle.
DThe pressure in the left ventricle becomes greater than the pressure in the aorta.
✓ Correct answer
D: The pressure in the left ventricle becomes greater than the pressure in the aorta.
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