Which of the following is NOT a stimulus for breathing?Rising carbon dioxide levelsDecreased levels of oxygen in the arteriesAcidosis that is often due to increased build-up of carbon dioxideRising blood pressureUnlike inhalation, exhalation is a passive act because no muscular contractions are necessary. However, there are two main factors that exhalation does depend on. Which of the options below best explains those factors that allow air to move out of the lungs?The recoil of elastic fibers in the lung tissue that stretched during inhalation and the inward pull of surface tension due to the fluid that coats the alveoli.The further expansion of the respiratory muscles contracted during inhalation and the increasing surface tension due to watery fluid coating the alveoli.The lack of surface tension on the alveolar wall combined with the contraction of the diaphragm.The pressure that carbon dioxide is exerting on the alveoli as well as the elasticity of the external intercostal muscles.Most particles breathed in, such as dust, fail to reach the lungs because of theCiliated mucous lining in the upper respiratory tractAbundant blood supply to the nasal cavityActions of the epiglottisThe macrophages in the alveoliVentilation-perfusion coupling means that more blood flows past functional alveoli than past non-functional alveoliTrueFalseWhen there is a significant rise in the amount of carbon dioxide in the arterial blood, how will lungs compensate?Decreased respiration rateIncrease respiration rateThere will be no change in respiration because other systems will compensateRespiratory rate does not change but the respiration depth becomes more shallow