WCU PHYS 261 Final
1.internal respiration and external respiration: What are the 2 types of respira- tion?
2.from a high area to a low area: In which direction does air flow due to pressure differences?
3.Gas exchange that occurs between the aleveoli and RBCs, and between the RBCs and tissue: What is internal respiration?
4.air movement between the lungs and the atmosphere: What is external res- piration?
5.when air moves from the atmosphere into the lungs: What is inhalation?
6.when air moves from the lungs into the atmosphere: What is exhalation?
7.that pressure and volume are inversely proportional: What is Boyle's Law?
8.760 mmHg: What is the atmospheric pressure at sea level?
9.pressure inside the lungs: What is intrapulmonary pressure?
10.volume inside the lungs: What is intrapulmonary volume?
11.760mmHg: What is the atmospheric pressure and intrapulmonary pressure when you are at rest?(neither inhaling or exhaling) .400ml air: What is the lung volume during rest?
13.lower: For inspiration, is the intrapulmonary pressure higher or lower than the atmospheric pressure?
14.-blood O2 levels are low, while CO2 is high
-chemoreceptors get stimulated
-chemoreceptors stimulate medulla(respiratory center)
-medulla stimulates the phrenic nerve
-phrenic nerve stimulates the diaphragm and respiratory muscles
-diaphragm and muscles move down and outward
-negative pressure created inside the lungs
-thoracic veins drain blood into the lungs
-increase in intrapulmonary volume
-decrease in intrapulmonary pressure by 4mmHg= 756mmHg
-air enters lungs: What are the steps of inspiration?
15.Central receptors
-located near the medulla
-detect hydrogen concentration in CSF and by detecting hydrogen, it can tell if CO2 has increased
Peripheral receptors -found in carotid artery and aortic bodies
-detects a decrease in O2 levels, and if decreased, it stimulates the medulla: -
What are the 2 types of chemoreceptors and their functions?
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