Student Laboratory Report 32- Lab Section RESPIRATORY PHYSIOLOGY A. Control of B

Question

Student Laboratory Report 32- Lab Section RESPIRATORY PHYSIOLOGY A. Control of Breathing Complete the following paragraph. Breathing is controlled by the center located in the 2 of the brain. The most important stimulus for breathing is the direct stimulation of this center by an 3 3 concentration of 4 in the blood and cere- brospinal fluid. 5 also acts directly on the control center. In contrast. 6 acts indirectly on the control center. Its concentration is detected by in the carotid arteries and aorta, which send impulses to the control center. Usually, 8concentration is of little 7 importance in stimulating inspiration. B. Breathing Experiments Hyperventilation 1. Describe how you felt after hyperventilating. 2. Explain why it was easier to breathe into the paper bag. 3. Indicate how long you were able to hold your breath. After normal breathing soc Afier hyperventilatingsec Explain your results Deglutition Apnea 1. Indicate whether the urge to breathe decreased or increased when you sipped the water through the straw 2. 1s this phenomenon a reflex or a voluntary response? 319

Explanation / Answer

A

B

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