2. Breathing, or ventilation, is a cyclic process consisting of two stages, inspiration and expiration. Air only moves when there is a pressure gradient, moving from high pressure to low pressure. To ventilate, we must create pressure gradients that drive air through our airways into or out of our lungs. We need to change the air pressure in our alveoli. We achieve this using the principle described in Boyle's Law. Boyle's Law states that when temperature is held constant, pressure is inversely related to volume - that is, when volume of a chamber increases, air pressure in that chamber decreases, and vice versa. By changing the size (volume) of the thoracic cage, we change pressure in our alveoli. To inhale, we must make our thoracic cage larger. To exhale, we must make our thoracic cage smaller. Label the diagram below, showing the muscles of our chest wall and diaphragm: (a) (b) (e)

2. Breathing, or ventilation, is a cyclic process consisting of two stages, inspiration and expiration. Air only moves when there is a pressure gradient, moving from high pressure to low pressure. To ventilate, we must create pressure gradients that drive air through our airways into or out of our lungs. We need to change the air pressure in our alveoli. We achieve this using the principle described in Boyle's Law. Boyle's Law states that when temperature is held constant, pressure is inversely related to volume - that is, when volume of a chamber increases, air pressure in that chamber decreases, and vice versa. By changing the size (volume) of the thoracic cage, we change pressure in our alveoli. To inhale, we must make our thoracic cage larger. To exhale, we must make our thoracic cage smaller. Label the diagram below, showing the muscles of our chest wall and diaphragm: (a) (b) (e)

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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