The reasons behind the absence of squid-like giant axon in humans.

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Chapter 19, Problem 69TE

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The reasons behind the absence of squid-like giant axon in humans.

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. During inspiration, the volume of the lungs is actively increased by the action of the diaphragm. As the volume of the lungs increases, the pressure within the lungs falls about 1 mmHg below atmospheric pressure. Air rushes into the lungs due to this pressure difference. Bronchi, Bronchial Tree, and Lungs Larynx Primary bronchi Secondary bronchi Tertiary bronchi Bronchioles Cardiac notch Pulmonary artery Trachea Pulmonary vein Alveolar duct Alveoli This image is part of the Public Domain: https://upload.wikimedia.org/wikipedia/commons/d/db/Illu bronchi lungs.jpg Fig. 1: The bronchi, bronchial trees, and the lungs. (a) The diameter of the trachea (windpipe) is about 17 mm. What net force does the air experience during inhalation? F net = N L (b) The flow rate of air entering the lungs is about 1.1 What is the velocity of air moving S through the windpipe? Vwindpipe cm S (c) The trachea divides into the left and right bronchi. Each main bronchus then divides into lobar bronchi (three…

During inspiration, the volume of the lungs is actively increased by the action of the diaphragm. As the volume of the lungs increases, the pressure within the lungs falls about 1 mmHg below atmospheric pressure. Air rushes into the lungs due to this pressure difference. Bronchi, Bronchial Tree, and Lungs Larynx Primary bronchi Secondary bronchi Tertiary bronchi. Bronchioles Cardiac notch Pulmonary vein Pulmonary artery Trachea Alveolar duct Alveoli This image is part of the Public Domain: https://upload.wikimedia.org/wikipedia/commons/d/db/Illu_bronchi_lungs.jpg Fig. 1: The bronchi, bronchial trees, and the lungs. (a) The diameter of the trachea (windpipe) is about 17 mm. What net force does the air experience during inhalation? Fne = net N L (b) The flow rate of air entering the lungs is about 1.1 What is the velocity of air moving S through the windpipe? V windpipe = cm S