WCU PHYS 261 FINAL REVIEW
QUESTIONS WITH COMPLETE VERIFIED
ACTUAL ANSWERS.GRADE A+ ASSURED
What are the 2 types of respiration? - answer ✔✔-internal respiration and external respiration
In which direction does air flow due to pressure differences? - answer ✔✔-from a high area to a low
area
What is internal respiration? - answer ✔✔-Gas exchange that occurs between the aleveoli and RBCs,
and between the RBCs and tissue
What is external respiration? - answer ✔✔-air movement between the lungs and the atmosphere
What is inhalation? - answer ✔✔-when air moves from the atmosphere into the lungs
What is exhalation? - answer ✔✔-when air moves from the lungs into the atmosphere
What is Boyle's Law? - answer ✔✔-that pressure and volume are inversely proportional
What is the atmospheric pressure at sea level? - answer ✔✔-760 mmHg
What is intrapulmonary pressure? - answer ✔✔-pressure inside the lungs
What is intrapulmonary volume? - answer ✔✔-volume inside the lungs
, What is the atmospheric pressure and intrapulmonary pressure when you are at rest?(neither inhaling
or exhaling) - answer ✔✔-760mmHg
What is the lung volume during rest? - answer ✔✔-400ml air
For inspiration, is the intrapulmonary pressure higher or lower than the atmospheric pressure? - answer
✔✔-lower
What are the steps of inspiration? - answer ✔✔--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 2 types of chemoreceptors and their functions? - answer ✔✔-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 steps of expiration? - answer ✔✔--inhalation caused the lungs to be filled with air
-stimulates stretch receptors within the medulla
QUESTIONS WITH COMPLETE VERIFIED
ACTUAL ANSWERS.GRADE A+ ASSURED
What are the 2 types of respiration? - answer ✔✔-internal respiration and external respiration
In which direction does air flow due to pressure differences? - answer ✔✔-from a high area to a low
area
What is internal respiration? - answer ✔✔-Gas exchange that occurs between the aleveoli and RBCs,
and between the RBCs and tissue
What is external respiration? - answer ✔✔-air movement between the lungs and the atmosphere
What is inhalation? - answer ✔✔-when air moves from the atmosphere into the lungs
What is exhalation? - answer ✔✔-when air moves from the lungs into the atmosphere
What is Boyle's Law? - answer ✔✔-that pressure and volume are inversely proportional
What is the atmospheric pressure at sea level? - answer ✔✔-760 mmHg
What is intrapulmonary pressure? - answer ✔✔-pressure inside the lungs
What is intrapulmonary volume? - answer ✔✔-volume inside the lungs
, What is the atmospheric pressure and intrapulmonary pressure when you are at rest?(neither inhaling
or exhaling) - answer ✔✔-760mmHg
What is the lung volume during rest? - answer ✔✔-400ml air
For inspiration, is the intrapulmonary pressure higher or lower than the atmospheric pressure? - answer
✔✔-lower
What are the steps of inspiration? - answer ✔✔--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 2 types of chemoreceptors and their functions? - answer ✔✔-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 steps of expiration? - answer ✔✔--inhalation caused the lungs to be filled with air
-stimulates stretch receptors within the medulla
