Psychology 2036A/B Lecture Notes - Lecture 13: Thermoregulation, Isoniazid, Thoracic Cavity

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This system is involved in the uptake portion of vo2. Alveoli tissue laid out flat: 1/2 the size of a tennis court= 90sq m. Dead space: any area where we don"t have gas exchange occurring. Insulates the lungs from anything that is happening external from that in the chest cavity. As ribs pull out the lungs expand with them. Action of diaphragm and costal muscles affects intrapleural and intrapulmonary pressures ity ures leading to inspiration and expiration. You will see changes in lung pressure during inspiration and expiration. When the rib cage expands it increases volume of thoracic cavity which means the pressur ssure drops and you inhale. Neutral pressure = atmospheric pressure (no movement of air from room into lung and vi. Once pressure within lungs decreases, the volume increases and we bring air into the lung. When the pressure inside lungs is greater than in the room, and volume decreases and we.

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