Respiratory System 4, Pressure changes during breathing

Pressure changes that facilitate breathing. Answer all of the following MCQs and leave your answers in the comments section for marking.

During exhalation and before the onset of inhalation the intrapleural pressure is;
a. 0 mm Hg
b. 2 mm Hg
c. 4 mm Hg.
d. 6 mm Hg

During inhalation the intrapleural pressure is;
a. 0 mm Hg
b. 2 mm Hg
c. 4 mm Hg
d. 6 mm Hg

Which of the following is an accessory muscle of ventilation?
a. sternocleidomastoid
d. diaphragm
c. external intercostals
d. myocardium

During the process of inspiration the;
a. diaphragm contracts and moves downward.
b. diaphragm contracts and moves upwards
c. diaphragm relaxes and moves downward
d. diaphragm relaxes and moves upwards

During the process of inspiration the;
a. external intercostal muscles relax and move the diaphragm upwards
b. external intercostal muscles relax to allow the chest wall to move up and out
c. the external intercostal muscles contract and move the chest wall down and in
d. the external intercostal muscles contract and move the chest wall up and out

Which statement about the ribs is true?
a. men have 12 pairs of ribs and women have 11 pairs
b. men have 11 pairs of ribs and women have 12 pairs
c. ten pairs of ribs are connected to the sternum by costal cartilage
d. all of the ribs are directly attached to the sternum by the costal cartilage

Which statements about inspiration is true?
a. air is blown into the lungs using positive pressure ventilation
b. air is sucked into the lungs using negative pressure ventilation.
c. the diaphragm moves upwards
d. air enters the lungs as a result of the passive recoil of the elastic walls of the alveoli

Identify one true statement:
a. intrapulmonary pressure is lower than atmospheric pressure during expiration
b. intrapulmonary pressure is higher than atmospheric pressure during inspiration
c. intrapulmonary pressure is the same as the pressure in the alveoli.
d. intrapulmonary pressure is higher than the pressure in the alveoli
e. intrapulmonary pressure is lower than the pressure in the alveoli

[catherinelora]

Every time I watch your videos I am amazed at how you manage to take complicated processes and make them easy to understand! You’re wonderful and I thank you so much for giving me the confidence that I can achieve my goals if I just keep working hard!!!! Sometimes you need something explained in a way you can understand 😊Thank you, please keep posting!

[umaimahnawaz]

Dear dr...after i watched your video i was able to breathe a sigh of relief...and as i did it...i was aware of how the pressure in my lungs was changing. bless your kindness and generosity you wonderful man. love you and everything you have done for the world. i sit here and i think...I finally understand.

[giselletauro]

Thank you Dear Doctor John Campbell for this beautiful teaching. You have made some of the most complex cocepts so simple. I was struggling to understand for days. I tried reading through many resources but it is your teachinf that truly enlightened my eyes of understanding. Im in tears as I write this. You are a blessing sent by God. I aspire to teach my students in the future with such simplicity as how you have taught me whilst im a medical student

[lindasun]

I took more deep breath while watching this video. Thank you!

This is a more concise explanation than any biology textbook or article I've read. Great video for the layman.

[chloer.]

Thank you so much Dr.Campbell to this day your videos are helping the healthcare workers of the future!Thank you! ❤🎉

[katierush]

Brilliant teaching. This has helped me to understand much more. Thank you

[toyosiakintunde]

Thank you so much for the video it was very helpful
1. C
2. D
3. A
4. A
5. D
6. C
7. B
8. C

[cindycho]

That makes so much more sense now, thank you :))

[lucasp]

Great explanation, thanks!! Greetings from Argentina.

[sayantandutta]

Dr.John Campbell, will you please explain how intrapleural pressure prevents lung collapse?Thank you so much Dr.

[ggnero]

From med school in Iraq 🇮🇶 thank you doctor

[sheetalmahajan]

This is the bestttt🥺💜thank u so muchhhh. May this channel flourish a lot. Thank u thank u... Must watch vdo

[Punct]

Dr. John Campbell thank you for doing this sir, It s such an amazing work! can’t wait for the bone formation/Growth video if you still have it in your mind and have time to do it sir.

[medmadeeasy]

4:42 external coastal or internal coastal??

[shashimoghe]

Dr john Campbell sir sn excellent piece of information thanks 27/04/2021

[riteshchaurasia]

How does intra pleural pressure becomes more negative during inhalation..?when the lung expand the space between intra pleural space too increases..then how it goes more negative ..plz kindly explain..indeed great explanation the for it

[andrewgillon]

Dr. John. I think people should also be aware of the potential dangers of touching mail, mail boxes, and packages that may have been handled by someone who has the infection.

[의사-lf]

Both the lungs are not of same size right?

[AlexandraMSv]

Every time I do the respiratory system I come back to this video