Kinesiology 2230A/B Lecture Notes - Lecture 18: Partial Pressure, Vital Capacity, Central Chemoreceptors
14 Mar 2018
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Document Summary
The average energy of particles in a fluid are governed by the t. Some particles may have energy than the avg. These can escape from the attractive forces holding the liquid together (evaporation in the lung) Stimulus for ventilation when contractile activity begins, also associated with joint movement. Receptors in the lung (stretch sensitive) leading to expiration. In a activity respiration is going to be driven by chemical signals. Central chemoreceptors only monitor changes in co2 and ph (located in the blood gas barrier) - not sensitive to changes in o2. Buffering occurring producing more co2 - changes that occur are what leads to changes in ventilation. The %o2 is going to be decreasing as you increase your altitude. Partial pressure of alveolar oxygen is going to decrease as you go up in altitude (pao2) No change in ventilation though pao2 is decreasing- change doesn"t occur until 60mmhm.
