The valve between the left atrium and left ventricle does not close fully. What is the immediate effect when the left ventricle contracts?
Some blood moves into the right ventricle, reducing flow to the lungs.
Some blood moves into the pulmonary vein, increasing flow from the lungs.
Some blood moves into the left atrium, reducing flow into the aorta.
Some blood moves into the vena cava, increasing flow from the body.
42 exam-style questions on Edexcel GCSE Biology 8.2 Blood and circulation, covering 8.2.1 Structure and function of the blood, 8.2.2 Structure of blood vessels, 8.2.3 Structure of the heart and circulatory system, and 8.2.4 Cardiac output. Each one has a worked solution and a mark scheme showing where the marks go.