What is homeostasis?, The production of hormones by endocrine glands, The maintenance of a stable internal environment despite external changes, The movement of blood through the heart, The exchange of gases in the lungs, Which part of the brain plays a key role in regulating homeostasis?, Cerebellum, Medulla oblongata, Hypothalamus, Frontal lobe, During gas exchange, oxygen moves from the alveoli into the blood by:, Active transport, Osmosis, Diffusion, Filtration, Which structure provides the main site of gas exchange in the lungs?, Bronchi, Trachea, Alveoli, Pleura, Most oxygen in the blood is transported:, Dissolved in plasma, Bound to haemoglobin in red blood cells, Attached to platelets, Bound to white blood cells, Which blood vessel carries oxygenated blood from the lungs to the heart?, Pulmonary artery, Aorta, Vena cava, Pulmonary vein, Which side of the heart pumps blood to the lungs?, Left atrium, Left ventricle, Right atrium, Right ventricle, An increase in carbon dioxide levels in the blood will normally:, Decrease the respiratory rate, Increase the respiratory rate, Stop gas exchange, Reduce oxygen demand, What is the normal pH range of arterial blood in a healthy adult?, 6.80–7.00, 7.00–7.20, 7.35–7.45, 7.50–7.70, Which statement best describes negative feedback in homeostasis?, A response that amplifies a change in the body, A response that reverses a change to restore normal conditions, A response that permanently alters body function, A response that only occurs during illness

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