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41 Where do B-cell and T-cells mature?
42 What is another name for activated T-cells that attack other cells?43 What are activated B-cells called and what do they secrete?44 List the 5 classes of antibodies. Which ones are made first? Which one is the main class of antibodies?45 Which antibodies can cross the placenta?46 List all the parts of upper and lower respiratory tract.47 Explain how the gasses diffuse in the lungs and in peripheral tissues.48 List all the muscles used in respiration. Which ones are used in quiet breathing and which ones are used in forced breathing only? Which ones are for expiration and which ones for inspiration?
49 What is the role of compliance, resistance (properties of lungs and chest walls), water surface tension and surfactant in breathing?