Respiratory System 4, Pressure changes during breathing 

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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.

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

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

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

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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.

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

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Hi Dr. Campbell you might already explain or have a video on ABG and VBG. I’m having a hard time connecting the dots. Why would VBG numbers are slightly higher than ABG?

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

Hello Dr. Cambell. I would like to talk to you because I have Cerebral Palsy. I also have Paroxysmal Supra Ventricular Tachychardia. I was just wondering if my PSVT can be dangerous for me. I learned about a Valsalva Maneouver when i breathe in an empty glass. Then I somehow lift my legs up on my sofa and it kills the PSVT. I have to repeat it a few times and then it stops.

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

Dr, please can you explain to me more about what makes the pressure negative? Can a pressure be negative? Again, you explained that on a normal condition the Lungs (with the visceral pluralmembrane) always move with the parietal pluralmembrane because both are socked to each on account of the interplurall fluid. If it is then the case they they always move together, when does the negative pressure occur? On a normal condition, given your explanation, they are prevented from pulling apart because of the interplural fluid.

4:42 external coastal or internal coastal??

I completed the questions and I have answers but unsure if they are correct; I went with 4mmHg for first answer. How do I find out if I am correct or not?

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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

Both the lungs are not of same size right?

Why IP changes from -4 to -6

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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; Pressure in the lungs is greater than atmospheric pressure, the intrapleural pressure is always negative relative to the intrapulmonary pressure by 4 mmHg. a. 0 mm Hg intrapleural ✏ b. 2 mm Hg c. 4 mm Hg. intrapulmonary 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 (negative 6). ✏ 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. ✏ It becomes flattened allowing lung volume to increase. 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 ✏ True ribs are 8 pairs, and false ribs are 4 pairs, 9th and 10th are attached to the costal cartilage indirectly and the 11th and 12th are floating ribs that are not attached to the sternum at all. 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

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1.D 2.C 3.A 4.A 5.D 6.C 7.A 8.C I hope am correct sir

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