× Didn't find what you were looking for? Ask a question
Top Posters
Since Sunday
r
4
L
4
3
d
3
M
3
l
3
V
3
s
3
d
3
a
3
g
3
j
3
This topic contains 1 attachment.
Home Q & A Board Biology-Related Homework Help Anatomy and Physiology
New Topic  
kmaster87 kmaster87
wrote...
Posts: 2
Rep: 0 0
12 years ago
Why is there a continuous inward-directed movement for oxygen in the lungs?
Read 3462 times
2 Replies

Related Topics

Replies
wrote...
#1
Valued Member
12 years ago
During heavy breathing – active expiration – contract abdominal muscles (increase intra-abdominal pressure Rightwards Arrow pushes diaphragm up Rightwards Arrow increases intrathoracic pressure), internal intercostal muscles (pull ribs downward, inward) Rightwards Arrow lungs are emptied more forcefully. During forceful expiration, intrapleural pressure exceeds atmospheric pressure, but lungs don’t collapse because intra-alveolar pressure increases, too (4 mmHg pressure gradient stays same).

Enjoy the attachment, btw, what textbook is this question coming from? Thinking Face
 Attached file 
(135.5 KB)
You must login or register to gain access to this attachment.
Don't forget to give me a thumbs up!
kmaster87 Author
wrote...
#2
12 years ago
marieb 8th edition
Why is there a continuous outward-directed movement for carbon dioxide in the lungs?
New Topic      
Quick Reply
Explore
Post your homework questions and get free online help from our incredible volunteers
  1390 People Browsing
Start New Topic Take the Tour CoursesNew Study Tools Topics Trending Browse by Textbook
Live Chat
Related Images
  
 1735
  
 1414
  
 616
Your Opinion
What's your favorite math subject?
Votes: 559
Previous poll results: What percentage of nature vs. nurture dictates human intelligence?