Busy. Please wait.

show password
Forgot Password?

Don't have an account?  Sign up 

Username is available taken
show password


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.
We do not share your email address with others. It is only used to allow you to reset your password. For details read our Privacy Policy and Terms of Service.

Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
Didn't know it?
click below
Knew it?
click below
Don't know
Remaining cards (0)
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

Resp Physio

Pulmonary Gas Exchange (External Respiration) + Capillary Gas Exchange

Pulmonary Gas Exchange I --oxygen enters the blood in the lungs and carbon dioxide leaves --the movement of these gases is affected by partial pressure gradients and gas solubilities
Pulmonary Gas Exchange II steep gradient of PO2 across the respiratory membrane (PO2 of venous blood in the pulmonary arteries is only 40 mm Hg compared to 104 mm Hg in the alveoli), as a result, oxygen diffuses rapidly from the alveoli into the lung capillaries
Pulmonary Gas Exchange III partial pressure gradient for CO2 is much less steep (45 mm Hg in the lung capillary blood vs. 40 mm Hg in the alveoli), however, because CO2 is 20 times more soluble in plasma than oxygen is, it is exchanged at equal rates as oxygen.
Capillary Gas Exchange in the Body Tissues (Internal Respiration) the partial pressure and diffusion gradients are reversed in the body tissues due to their metabolic activities, cells constantly use oxygen and produce equal amounts of carbon dioxide
Capillary Gas Exchange II PO2 in the tissues is always lower than in the syst arterial blood (40 mm Hg to 104 mm Hg, respectively), therefore, 02 rapidly diffuses from the blood into the tissues -
Capillary Gas Exchange III -CO2 moves in the opposite direction (from tissues into the blood), along its own partial pressure gradient -venous blood draining the capillary beds of the tissues and returning to the heart has a PO2 of 40 mm Hg and a PCO2 of 45 mm Hg
Created by: zeenat



Use these flashcards to help memorize information. Look at the large card and try to recall what is on the other side. Then click the card to flip it. If you knew the answer, click the green Know box. Otherwise, click the red Don't know box.

When you've placed seven or more cards in the Don't know box, click "retry" to try those cards again.

If you've accidentally put the card in the wrong box, just click on the card to take it out of the box.

You can also use your keyboard to move the cards as follows:

If you are logged in to your account, this website will remember which cards you know and don't know so that they are in the same box the next time you log in.

When you need a break, try one of the other activities listed below the flashcards like Matching, Snowman, or Hungry Bug. Although it may feel like you're playing a game, your brain is still making more connections with the information to help you out.

To see how well you know the information, try the Quiz or Test activity.

Pass complete!

"Know" box contains:
Time elapsed:
restart all cards