PHYSIOL 201 Lecture Notes - Lecture 26: Peripheral Chemoreceptors, Medulla Oblongata, Smooth Muscle Tissue
3 May 2019
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Lecture 11: breathing, chemoreceptors, changes in blood gasses: process of breathing is involuntary, pacemakers in the medulla oblongata that control skeletal muscle, can voluntarily control to take a bigger breath, but that is not required. Breathing : occurs due to activation of the diaphragm, which is a smooth muscle tissue, false. Breathing can be altered by higher centers like the motor cortex, centers in the pons, and emotion centers: can be altered by things like joint activity and muscle activity, true. Many different peripheral inputs can alter breathing, including afferent feedback from joints and muscles. Increased pco2 due to inadequate ventilation increased h+ (h plus bicarbonate) Indirectly detect the change in pco2: can detect h no matter where it comes from increased arterial pco2 via h+ change, homeostatic process, metabolic acid increased ventilation would drop co2 so h+ would drop. If we have high co2, less co2 can flow out of brain into blood so there is elevated.
