WCU PHYS 261 FINAL | FROM PRACTICE TO
PERFECTION | GUARANTEED SUCCESS!
Internal respiration and external respiration - Answer: What are the 2 types of
respiration?
From a high area to a low area - Answer: In which direction does air flow due to
pressure differences?
Gas exchange that occurs between the aleveoli and rbcs, and between the rbcs and
tissue - Answer: What is internal respiration?
Air movement between the lungs and the atmosphere - Answer: What is external
respiration?
When air moves from the atmosphere into the lungs - Answer: What is inhalation?
When air moves from the lungs into the atmosphere - Answer: What is exhalation?
That pressure and volume are inversely proportional - Answer: What is Boyle's Law?
760 mmhg - Answer: What is the atmospheric pressure at sea level?
Pressure inside the lungs - Answer: What is intrapulmonary pressure?
Volume inside the lungs - Answer: What is intrapulmonary volume?
760mmhg - Answer: What is the atmospheric pressure and intrapulmonary pressure
when you are at rest?(neither inhaling or exhaling)
400ml air - Answer: What is the lung volume during rest?
1
APPHIA - Crafted with Care and Precision for Academic Excellence.
, Lower - Answer: For inspiration, is the intrapulmonary pressure higher or lower than the
atmospheric pressure?
-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 - Answer: What are the steps of inspiration?
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 - Answer:
What are the 2 types of chemoreceptors and their functions?
-inhalation caused the lungs to be filled with air
-stimulates stretch receptors within the medulla
-medulla inhibits the phrenic nerve
-diaphragm and respiratory muscles no longer stimulated by phrenic nerve
-diaphragm and muscles relax
-diaphragm moves up and muscles move inward
2
APPHIA - Crafted with Care and Precision for Academic Excellence.
PERFECTION | GUARANTEED SUCCESS!
Internal respiration and external respiration - Answer: What are the 2 types of
respiration?
From a high area to a low area - Answer: In which direction does air flow due to
pressure differences?
Gas exchange that occurs between the aleveoli and rbcs, and between the rbcs and
tissue - Answer: What is internal respiration?
Air movement between the lungs and the atmosphere - Answer: What is external
respiration?
When air moves from the atmosphere into the lungs - Answer: What is inhalation?
When air moves from the lungs into the atmosphere - Answer: What is exhalation?
That pressure and volume are inversely proportional - Answer: What is Boyle's Law?
760 mmhg - Answer: What is the atmospheric pressure at sea level?
Pressure inside the lungs - Answer: What is intrapulmonary pressure?
Volume inside the lungs - Answer: What is intrapulmonary volume?
760mmhg - Answer: What is the atmospheric pressure and intrapulmonary pressure
when you are at rest?(neither inhaling or exhaling)
400ml air - Answer: What is the lung volume during rest?
1
APPHIA - Crafted with Care and Precision for Academic Excellence.
, Lower - Answer: For inspiration, is the intrapulmonary pressure higher or lower than the
atmospheric pressure?
-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 - Answer: What are the steps of inspiration?
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 - Answer:
What are the 2 types of chemoreceptors and their functions?
-inhalation caused the lungs to be filled with air
-stimulates stretch receptors within the medulla
-medulla inhibits the phrenic nerve
-diaphragm and respiratory muscles no longer stimulated by phrenic nerve
-diaphragm and muscles relax
-diaphragm moves up and muscles move inward
2
APPHIA - Crafted with Care and Precision for Academic Excellence.
