Exam (elaborations)
WCU PHYS 261 FINAL EXAM QUESTIONS WITH COMPLETE SOLUTION 2025
- Course
- Institution
WCU PHYS 261 FINAL EXAM QUESTIONS WITH COMPLETE SOLUTION 2025
[Show more]
Content preview
HOSMERITWCU PHYS 261 FINAL EXAM QUESTIONS WITH
COMPLETE SOLUTION 2025
What are the 2 types of respiration? - Correct Answer - internal respiration and external
respiration
In which direction does air flow due to pressure differences? - Correct Answer - from a high area
to a low area
What is internal respiration? - Correct Answer - Gas exchange that occurs between the aleveoli
and RBCs, and between the RBCs and tissue
What is external respiration? - Correct Answer - air movement between the lungs and the
atmosphere
What is inhalation? - Correct Answer - when air moves from the atmosphere into the lungs
What is exhalation? - Correct Answer - when air moves from the lungs into the atmosphere
What is Boyle's Law? - Correct Answer - that pressure and volume are inversely proportional
What is the atmospheric pressure at sea level? - Correct Answer - 760 mmHg
What is intrapulmonary pressure? - Correct Answer - pressure inside the lungs
What is intrapulmonary volume? - Correct Answer - volume inside the lungs
,What is the atmospheric pressure and intrapulmonary pressure when you are at rest?(neither
inhaling or exhaling) - Correct Answer - 760mmHg
What is the lung volume during rest? - Correct Answer - 400ml air
For inspiration, is the intrapulmonary pressure higher or lower than the atmospheric pressure? -
Correct Answer - lower
What are the steps of inspiration? - Correct 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? - Correct 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? - Correct Answer - -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
-lungs recoil properly
-blood is pushed out of the lungs
-decrease in intrapulmonary volume
-increase in intrapulmonary pressure by 8mmHg= 764mmHg
-air leaves lungs
What are the parts of components capacity and their meaning? - Correct Answer - a- tidal
volume(TV): a normal breath
- inspiratory reserve volume(IRV): the amount of air your can forcefully inhale after a normal
inhale
- expiratory reserve volume(ERV): the amount of air you can forcefully exhale after a normal
exhale
- vital capacity(VC): the amount of air that can be manipulated
- residual volume(RV): the amount of air always lef t in the lungs
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller Hosmerit. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $14.29. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
83100 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now