WCU PHYS 261 EXAM PREP
QUESTIONS ANSWERS EXPERT
VERIFIED
◉ 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?
◉ 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
QUESTIONS ANSWERS EXPERT
VERIFIED
◉ 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?
◉ 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
