To efficiently supply oxygen to respiring tissue cells, the mammalian double circulatory system maintains distinct blood pressures and oxygenation states within its major vessels.
Which of the following options correctly describes both the oxygenation state and the relative pressure of the blood in the two specified vessels?
Pulmonary vein: oxygenated, low pressure; Aorta: oxygenated, high pressure
Pulmonary artery: oxygenated, high pressure; Vena cava: deoxygenated, low pressure
Pulmonary vein: deoxygenated, low pressure; Aorta: oxygenated, high pressure
Pulmonary artery: deoxygenated, low pressure; Vena cava: oxygenated, high pressure
82 exam-style questions on OCR GCSE Biology 2.1 Supplying the cell, covering 2.1.1 Transport across cell membranes, 2.1.2 Mitosis and the cell cycle, 2.1.3 Importance of cell differentiation, and 2.1.4 Stem cells. Each one has a worked solution and a mark scheme showing where the marks go.