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Exercise Breathing

Control of Breathing

QuestionAnswer
What happens to Arterial O2 during exercise? remains NORMAL
What happens to Arterial CO2 during exercise? Normal --> Declines
What happens to arterial H+ during exercise? Acidifies w/ Intense Exercise
What is the function of the Motor Cortex during exercise? APs --> exercising Muscles & Inspiratory Center
What is the function of Mechanoreceptors during exercise? receptors in Joints and Tendons --> + Inspiratory Center & CVC
What is meant by "Thermal Excitation" during exercise? Heat of exercise warms the Inspiratory Center
What role do Hormones play in exercise? --> ß2-Adrenergic receptors --> DILATION of Bronchioles (smooth muscle)
What 4 factors effect control of breathing during exercise ans what is their significance? 1. Motor Cortex; 2. Mechanoreceptors; 3. Thermal Excitation; 4. Hormones - ^ MV IMMEDIATELY to maintain Hemostasis
Which 2 factors of breathing control during exercise are responsible for increasing MV? Motor Cortex, Mechanoreceptors
What would be the pathway result of hold your breath? hold breath --> decrease O2 --> increase CO2 --> decrease pH --> overrides choice - protect CSF
Created by: Kristel
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