Why must a person floating on the surface of the water and breathing through a snorkel increase tidal volume and/or breathing rate to maintain normal alveolar ventilation?
a. The lumen of the snorkel introduces additional dead space, adding to the residual volume of the airways.
b. Breathing through the mouth introduces more airway resistance than breathing through the nostrils.
c. Breathing through a snorkel decreases the total resistance of the airways to air flow.
d. Water pressure compresses the chest cavity, making breathing more difficult.
I think it is d. Please help.
2007-03-09 10:46:18 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Biology
The answer is clearly A. The volume of the lumen is added to the tidal volume and so, the minute ventilation must increase maintain the same alveolar ventilation. The water pressure may require more energy but doesn't affect the tidal volume easily. Unless you're fatigued.
2007-03-09 12:18:49 · answer #1 · answered by misoma5 7 · 1⤊ 0⤋
verify any encyclopedia. i'm going to provide you a start up: the lungs start up with the glottic commencing off of the trachea which branches into the left and suited mainstem bronchus feeding the left and suited lung. the appropriate lung has 3 lobes, the left 2. the L and R bronchus divide consistently into brochioles ultimately achieving the alveoli the place gas substitute occurs. physique shape is a lot greater complicated yet to simplify it to a daft degree: the lungs are an organ requiring oxygen as much as their function is to replace oxygen and carbon dioxide on the alveolar point. the blood flow to the lungs as an organ comes from the guts. the blood which exchanges oxygen and carbon dioxide additionally comes from the guts yet each and every flow has its very own vascular equipment. whilst the two gases are changing remarkable then the pH of the blood via the arterial blood furnish will stay between 7.38 and 7.40 two. the venous factor keeps a decrease pH because of the fact it includes a a techniques better share of CO2. the pH is substantial to appreciate because of the fact chemoreceptors interior the medulla (decrease component of the techniques cranium) are continuously sampling the pH and retaining respiration rhythm and intensity. like i suggested that's all very very simplified yet will help you recognize the authentic element would desire to you certainly study some on your very own .
2016-12-18 09:33:28 · answer #2 · answered by ? 4 · 0⤊ 0⤋
well, a, b and c are definately wrong so the answer must be D.
2007-03-09 11:24:05 · answer #3 · answered by audionaut 3 · 0⤊ 0⤋