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In quiet breathing, muscular effort is mainly in inspiration, and expiration is largely passive, due to elastic recoiling of the lung. Can you relate this fact to the pattern of expiratory and inspiratory flow? Hint: The normal pattern of breathing is efficient in that it requires muscular effort for only a short time.

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sarahussienelmeazwy

Explanation:

during exercise,there is receptors which are present in skeletal muscle ,send sensory afferent to CAC ,in turn stimulate If,so amount of oxygen to muscles increase

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